The formula to calculate the sector area is: \(\text{Sector area} = \frac{\text{angle}}{360} \times \pi \times r^2 \) Question Calculate the minor sector area to one decimal place. Formula to find perimeter of the sector is. For a circle, that entire area is represented by a rotation of 360 degrees. To find the segment area, you need the area of triangle IDK so you can subtract it from the area of sector IDK. You can also find the area of a sector from its radius and its arc length. = (π x 18 2 x 25)/360. The area of the semi-circle is half the area of a circle with radius 5. And the Segment, which is cut from the circle by a \"chord\" (a line between two points on the circle). Also, explore the surface area or volume calculators, as well as hundreds of other math, finance, fitness, and health calculators. Now, substituting the values in the area of segment formula, the area can be calculated. The area can be found by the formula A = πr 2. Area of the sector is a sector like a ‘pizza slice’ in round-shaped pizza. Cite this calculator & page ? A circle sector or circular sector, is the portion of a disk enclosed by two radii and an arc, where the smaller area is known as the minor sector and the larger being the major sector. Sign in, choose your GCSE subjects and see content that's tailored for you. A pie-shaped part of a circle. Formula to find area of … How to Calculate the Area of a Sector: 7 Steps (with Pictures) The central angle between the two radii is used to calculate length of the radius. subtopic 8.3: area of sector of a circle chapter 8: circular measure Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If the angle is 180 degrees then the sector is a semi-circle. Circular segment - is an area of a circle which is "cut off" from the rest of the circle by a secant (chord).. On the picture: L - arc length h- height c- chord R- radius a- angle. To recall, a sector is a portion of a circle which is enclosed between its two radii and the arc adjoining them. There are two main \"slices\" of a circle: The \"pizza\" slice is called a Sector. what is the power circuit drawing of two contactors mechanically interlocked? =. Remember the area of a circle = \(\pi r^2\), The sector area is: \(\frac{1}{6} \times \pi \times 4^2 = 8.4~\text{cm}^2\), The formula to calculate the sector area is: \(\text{Sector area} = \frac{\text{angle}}{360} \times \pi \times r^2 \). You can find it by using proportions, all you need to remember is circle area formula (and we bet you do! A pie-shaped part of a circle. The formula used to calculate the area of a sector of a circle is: \[Area\,of\,a\,sector = \frac{{Angle}}{{360^\circ }} \times \pi {r^2}\] Example Question. how to find minor arc of a circle: how to find a central angle of a circle: how do you find a central angle: central angle formula in degrees: how to find the area of a sector of a circle with radius and central angle: measure of central angle calculator: the formula for the area of a sector with a central angle in radians is The formula for sector area is simple - multiply the central angle by the radius squared, and divide by 2: Sector Area = r² * α / 2; But where does it come from? The total area of the plot is the square less the semicircle: 900 - 12.5π square feet. Substitute the values in area of sector formula, Area = πr 2 × (θ / 360). A circular sector or circle sector (symbol: ⌔), is the portion of a disk enclosed by two radii and an arc, where the smaller area is known as the minor sector and the larger being the major sector. Do BJT NPN transistors change AC to DC once the electrons have surpassed the depletion region and flowed out to the anode? If its central angle is bigger, the area of the sector will also be larger accordingly. So, our sector area will be one fifth of the total area of the circle. Solution: Area of sector = 60°/360° × 25π = 13.09 cm 2 Two radii separate the area of a circle into two sectors - the major sector and the minor sector. The cost of upkeep is therefore 2.5 * … Mnuchin: Stimulus checks could arrive 'next week', Chris Christie renews warning about Michael Flynn, An engineer's quest to find the safest COVID masks, Saints star ejected for punch, takes blame for loss, Amazon shuts New Jersey facility after virus spike, Elliot Page thanks fans for their 'love and support', Izzard praised for embracing feminine pronouns, New mom McCain shares pregnancy photos for 1st time, Kilauea volcano erupts on Hawaii's Big Island, Here's what's in the new stimulus package. Read about our approach to external linking. HK subtends angle HOK at O,the centre of the circle. Solution for Arc Length and Area of Sector. To save money on Water should I attach a pipe from their water main to mine? = l + 2r. Find the radius of the circle. Example 1 Find the arc length and area of a sector of a circle of radius $6$ cm and the centre angle $\dfrac{2 \pi}{5}$. A rectangle is a quadrilateral with four right angles. Area of the circle = π r 2 = 3.1415 × (15) 2 = 3.1415 × 225 = 706.5 square cm Area of the major segment = area of the circle – area of the minor segment = 706.5 – 20.4 = 686.1 square cm. The area can be found by the formula A = πr2. Angle HOK=120degrees and OH=12 cm. For a sector the area … Note: A circular sector or circle sector, is the portion of a disk enclosed by two radii and an arc, where the smaller area is known as the minor sector and the larger being the major sector. Angle of the sector: The angle subtended by the corresponding arc of the sector at the centre of the circle is called the angle of the sector. Calculate The Area Of A Sector (Using Formula In Degrees) We can calculate the area of the sector, given the central angle and radius of circle. This free area calculator determines the area of a number of common shapes using both metric units and US customary units of length, including rectangle, triangle, trapezoid, circle, sector, ellipse, and parallelogram. It is one of the simplest shapes, and … formula to find sector area = (π r 2 θ) / 360. substitute the values. In other words, we may say the area of sector is proportional to the central angle. θ = central angle in degrees. Still have questions? The figure below shows two circles each of radius 10.5 cm with centres A and B. the circles touch each other at T Given that angle XAD =angle YBC = 160 0 and lines XY, ATB and DC are parallel, calculate the area of: d) The minor sector AXTD (2 marks) e) Figure AXYBCD (6marks) f) … Find the area of the minor segment AQBP. 86. Area of major sector is 274.89 units. As established, the only two measurements needed to calculate the area of a sector are its angle and radius. Calculate to 3 s.f. This sector consists of a region confined by an arc bounded between two radii. Draw an altitude straight down from D to segment IK. \(\frac{1}{6} \times \pi \times 4^2 = 8.4~\text{cm}^2\), \(\text{Sector area} = \frac{\text{angle}}{360} \times \pi \times r^2 \), \(\frac{144}{360} \times \pi \times 3.5^2 = 15.4~\text{cm}^2\), \(\frac{250}{360} \times \pi \times 6^2 = 78.5~\text{cm}^2\), Home Economics: Food and Nutrition (CCEA). The area of a shaded sector can be calculated by the same method we calculate the area of a sector. Area enclosed by an arc of a circle or Area of a sector = (θ/360o) x πR2 We have seen in this section how we are supposed to calculate area and perimeter of circle and arc. 12.01. To calculate the area of a segment bounded by a chord and arc subtended by an angle θ, first work out the area of the triangle, then subtract this from the area of the sector, giving the area of the segment. So if a sector of any circle of radius r measures θ, area of the sector can be given by: Area of sector = \(\frac{\theta }{360} \times \pi r^{2}\) Derivation: This video explains how to find the area of a sector. It is a fraction of the area of the circle. Find the area of circle segment IK. Radius of Area Sector Calculator A sector is a portion of a circle, which is enclosed by two radii and an arc lying between the area, where the smaller portion is called as the minor area and the larger area is called as the major area. Plugging our radius of 3 into the formula we get A = 9π meters squared or approximately 28.27433388 m 2. asked Aug 24, 2018 in Mathematics by AbhinavMehra ( … Sol. 2) Sum of the areas of major and minor sectors of a circle is equal to area of the circle. There are two special cases. So for example, if the central angle was 90°, then the sector would have an area equal to one quarter of the whole circle. Calculate Area of Ellipses, Perimeter, Focus & Eccentricity An ellipse is like a squished circle. Multiply the area by 2 and divide the result by the central angle in radians. A sector (of a circle) is made by drawing two lines from the centre of the circle to the circumference, and it looks like the usual 'wedge' cut from a cake. You’re all set to finish with the segment area formula: Area of the sector AOB (blue region + green region) = (θ/360°) × πr 2 = (60°/360°) × π × 6 2 = 6π cm 2 Area of ΔAOB = ½ × OC × AB Where OC = 6 cos 30° = 6 × (√3/2) = 3√3 cm separate the area of a circle into two sectors - the major sector and the minor sector. 2) Area sector OHK = (120/360) * area = 150.796 cm^2, 3) Area triangle OHK = 12cos30 * 12sin30 = 62.354 cm^2, 4) arc HK length = (120/360) * pi * (2*12) = 25.133 cm. Find the area of the minor segment of a circle of radius 14 cm, when the angle of the corresponding sector is 60°. The area of the full circle is 5 2 π = 25π, so the area of the semi-circle is half of that, or 12.5π. (i)area of circle (ii)area of minor sector OHK (iii)area of triangle HOK (iv)lenght of minor … Minor sector: The area enclosed by two radii of a circle and their intercepted arc. The units will be the square root of the sector area … The angle formed by latter is 360^@-45^@=315^@. Rectangle. We know that a full circle is 360 degrees in measurement. OP = √[r2–(AB/2)2] if the length of AB is given. ): The area of a circle is calculated as A = πr². For example, a pizza slice is an example of a sector which represents a fraction of the pizza.There are two types of sectors, minor and major sector. The formula for finding the area of a circle is pi*r*r where r is the radius. And then we just can solve for area of a sector by multiplying both sides by 81 pi. The total area of the plot is the square less the semicircle: 900 - 12.5π square feet. The major sector has an angle of \(360 - 110 = 250^\circ\). Calculate the minor sector area to one decimal place. Sector area is found $\displaystyle A=\dfrac{1}{2}\theta r^2$, where $\theta$ is in radian. The area enclosed by a sector is proportional to the arc length of the sector. S there a way to lower  outlet voltage from 126 to 120? Minor sector: The area enclosed by two radii of a circle and their intercepted arc. In other words, we may say the area of sector is proportional to the central angle. That creates two 30°- 60°- 90° triangles. Calculate the major sector area to one decimal place. To calculate the properties of an ellipse, two inputs are required, the Major Axis Radius (a) and Minor Axis Radius (b) . 81 pi, 81 pi-- so these cancel out. If r is the radius of a circle, then area of circle is pir^2. Is thicker better when it comes to transmission fluid. To calculate arc length without radius, you need the central angle and the sector area: Multiply the area by 2 and divide the result by the central angle in radians. When we draw the sector BAC, where m/_BAC=45^@, circle is divided in two parts - one is smaller sector BAC formed by arc BC, other is larger i.e. An easy to use, free area calculator you can use to calculate the area of shapes like square, rectangle, triangle, circle, parallelogram, trapezoid, ellipse, octagon, and sector of a circle. HK subtends angle HOK at O,the centre of the circle. A sector is a fraction of the circle’s area. : 234 In the diagram, θ is the central angle, the radius of the circle, and is the arc length of the minor sector. Area of the minor sector = 120 360 × π × 42 × 42 = 1 3 × π × 42 × 42 = π × 14 × 42 = 1848 cm 2 Area of the triangle = 1 2 R 2 sin θ Here, R is the measure of the equal sides of the isosceles triangle and θ is the angle enclosed by the equal sides. Step by step calculation. Note that our answer will always be an area so the units will always be squared. And the Segment, which is cut from the circle by a \"chord\" (a line between two points on the circle). Because 120° takes up a third of the degrees in a circle, sector IDK occupies a third of the circle’s area. The following is the calculation formula for the area of a sector: Where: A = area of a sector. radius r = 18 cm. If its central angle is bigger, the area of the sector will also be larger accordingly. For example in the figure below, the arc length AB is a quarter of the total circumference, and the area of the sector is a quarter of the circle area. Is it dangerous to bring a microwave to work everyday in my car? Arc length is a fraction of circumference. Python Code: def sectorarea(): pi =22/7 radius = float(input('Radius of Circle: ')) angle = float(input('angle measure: ')) if angle >= 360: print("Angle is not possible") return sur_area = ( pi * radius **2) * ( angle /360) print("Sector Area: ", sur_area) sectorarea () Sample Output: Radius of Circle: 4 angle measure: 45 Sector Area: 6.285714285714286. Ex 12.2, 1 Find the area of a sector of a circle with radius 6 cm if angle of the sector is 60 . In circle O, the radius is 4 ft, and the length of minor arc n ft. Find the angle АВ measure of minor arc AB. Similarly below, the arc length is half the circumference, and the area … Sector area = \(\frac{250}{360} \times \pi \times 6^2 = 78.5~\text{cm}^2\). Multiply this root by the central angle again to get the arc length. Get your answers by asking now. = 70.71 cm2. , first find what fraction of the whole circle we have. Write a Python program to calculate the area of a sector. The circumference is always the same distance from the centre - the radius. Since a sector is also known as some percentage of a circle, then the area itself is also a portion of the area of a circle. The sector is \(\frac{1}{6}\) of the full area. Perimeter of sector is = l + 2r Substitute l = 44 and r = 21. Join Yahoo Answers and get 100 points today. Area of a circle is given as π times the square of its radius length. where 'l' is the length of the minor arc AB. The length of the arc is the circumference of the whole circle multiplied by what fraction … = 44 + 2 (21) Related Video. The area of the semi-circle is half the area of a circle with radius 5. Here’s the formal solution: Find the area of circle segment IK. 360. A sector is a portion of a circle, which is enclosed by two radii and an arc lying between the area, where the smaller portion is called as the minor area and the larger area is called as the major area. Find the square root of this division. Python Math: Exercise-8 with Solution. Solution : The given values. (Take π = 3.142). For example, if the angle is 45° and the radius 10 inches, the area is (45 / 360) x 3.14159 x 10 2 = 0.125 x 3.14159 x 100 = 39.27 square inches. Our tips from experts and exam survivors will help you through. Multiply this root by the central angle again to get the arc length. Now we just need to find that area. To calculate the sector area, first find what fraction of the whole circle we have. Hence, find the area of major segment ALBQA Solution: Area of minor segment APBQ=θ/360° x πr²-r²sin45°cos45° =3.14 x 100/4-100 x 1/√2 x 1/√2 =(78.5-50)cm²=28.5 cm² Sin (θ/2) = a/R There are two main \"slices\" of a circle: The \"pizza\" slice is called a Sector. major sector BDCA. What the formulae are doing is taking the area of the whole circle, and then taking a fraction of that depending on what fraction of the circle the sector fills. Area of a triangle calculation using all different rules, side and height, SSS, ASA, SAS, SSA, etc. HK subtends angle HOK at O,the centre of the circle. This is a great starting point. sector angle θ = 25. Sectors, segments, arcs and chords are different parts of a circle. (see diagrams below) The triangle with angle θ can be bisected giving two right angled triangles with angles θ/2. In figure, is a chord AB of a circle, with centre O and radius 10 cm, that subtends a right angle at the centre of the circle. Sector area = \(\frac{144}{360} \times \pi \times 3.5^2 = 15.4~\text{cm}^2\). Area of Sector – Explanation & Examples. 32 1. So the area of the sector over the total area is equal to the degrees in the central angle over the total degrees in a circle. In fact, the unshaded region is also a sector of the circle. Thus, we have: 1 2 × 42 × 42 × sin 120 ° = 762. Sector area is found $\displaystyle A=\dfrac{1}{2}\theta r^2$, where $\theta$ is in radian. Now we multiply that by (or its decimal equivalent 0.2) to find our sector area, which is 5.654867 meters squared. (i)area of circle (ii)area of minor sector OHK (iii)area of triangle HOK (iv)lenght of minor … Formula to find length of the arc is. Circular segment. Example 10: An arc of a circle is of length 5π cm and the sector it bounds has an area of 20 π cm². Angle HOK=120degrees and OH=12 cm. If the angle is 360 degrees then the sector is a full circle. Area of the sector is a sector like a ‘pizza slice’ in round-shaped pizza. Let the radius of the circle be r cm and the arc AB of length 5π cm subtends angle θ at the centre O of the circle. The shaded region shows the area of the sector OAPB. This video explains how to find the area of a sector. The perimeter would be 2r + (length of arc). The length of the arc is the circumference of the whole circle multiplied by what fraction … Example: Given that the radius of the circle is 5 cm, calculate the area of the shaded sector. Angle HOK=120degrees and OH=12 cm. Formulas, explanations, and graphs for each calculation. can you do aeronautical engineering with a mechanical engineering degree/master? The area of the full circle is 5 2 π = 25π, so the area of the semi-circle is half of that, or 12.5π. Area of the minor segment = area of sector O A B – area of Δ O A B = 117.75 – 97.31 = 20.44 square cm Area of the circle = π r 2 = 3.1415 × (15) 2 = 3.1415 × 225 = 706.5 square cm The perimeter would be 2r + (length of arc). Sector area formula. Then, Arc AB = 5π cm and Area of sector … l = θ/360° ⋅ 2∏r. To find the area of a shaded sector: Get the radius and central angle. Both can be calculated using the angle at the centre and the diameter or radius. If you continue browsing the site, you agree to the use of cookies on this website. Find the square root of this division. Example 1 Find the arc length and area of a sector of a circle of radius $6$ cm and the centre angle $\dfrac{2 \pi}{5}$. The central angle between the two radii is used to calculate length of the radius. Plugging our radius of 3 into the formula we get A = 9π meters squared or approximately 28.27433388 m2. Given that, Radius = r = 6 cm & Angle of the sector = = 60 We know that, Area of sector of circle = /(360 ) r2 = 60/360 22/7 (6)2 = 1/6 22/7 36 How to calculate a sector area. Area of a sector is a fractions of the area of a circle. Calculate the area of this sector which has a 60° angle to one decimal place. Here, \(\angle AOB\) is the angle of the sector. The formula for area, A A, of a circle with radius, r, and arc length, L L, is: A = (r × L) 2 A = (r × L) 2 Here is a three-tier birthday cake 6 6 inches tall with a diameter of 10 10 inches. This sector consists of a region confined by an arc bounded between two radii. The cost of upkeep is therefore 2.5 * … As we know mathematics is not a spectator sport so we also got through its application in some practical examples of area and perimeter related to circle and arc. It is a fraction of the area of the circle. or, OP = r cos (θ/2), if θ is given (in degrees) Calculate the area of ∆AOB using the formula: (A area ΔAOB) = ½ × base × height = ½ × AB × OP. To find the segment area, you need the area of triangle IDK so you can subtract it from the area of sector … Circles are 2D shapes with one side and no corners. So, the shaded region is the area of the minor sector and the unshaded region is the area of the major sector. π = 3.141592654. r = radius of the circle. If you know radius and angle you may use the following formulas to calculate remaining segment parameters: Calculate to 3 s.f. In a semi-circle, there is no major or minor sector. 350 divided by 360 is 35/36. Following the unitary method the area of the arc subtending an angle of 360o at the centre, the angle subtended by a complete circle is πR2 then the arc suspending angle of θ will be: Area enclosed by an arc of a circle or Area of a sector = (θ/360o) x πR2 '' slice is called a sector like a ‘ pizza slice ’ in round-shaped pizza to... A Rectangle is a semi-circle 2 × ( θ / 360 ) formulas,,! Between the two radii is used to calculate the minor sector: get the arc length formula a = meters. The segment area, which is enclosed between its two radii is used to calculate length of arc.... Less the semicircle: 900 - 12.5π square feet by a sector see diagrams below ) triangle... S there a way to lower outlet voltage from 126 to 120 θ / 360 ) by what of!, calculate the area of a sector from its radius and central in. Proportional to the arc length approximately 28.27433388 m2 is found $ \displaystyle A=\dfrac { 1 } 2. 6 cm if angle of the circle now, substituting the values will always an... Cookies on this website circle we have contactors mechanically interlocked circle ’ s area the is! 21 ) this video explains how to find perimeter of sector IDK occupies a third of the sector... Pizza slice ’ in round-shaped pizza 2 and divide the result by the for! Water main to mine { 144 } { 360 } \times \pi \times 6^2 = 78.5~\text { cm ^2\... Of segment formula, area = \ ( \frac { 250 } { 360 } \times \times! Ab/2 ) 2 ] if the angle at the centre - the major sector an... Using all different rules, side and height, SSS, ASA, SAS,,. To bring a microwave to work everyday in my car each calculation browsing the,! A=\Dfrac { 1 } { 2 } \theta r^2 $, where $ \theta $ is radian... Will also be larger accordingly, choose your GCSE subjects and see content that 's tailored for you 250^\circ\.. Shows the area of a circle, then area of Ellipses, perimeter Focus. Power circuit drawing of two contactors mechanically interlocked decimal equivalent 0.2 ) to find of. Multiply the area of segment formula, the shaded sector l + substitute... A rotation of 360 degrees then the sector is proportional to the arc length of arc ) of formula..., 1 find the area can be bisected giving two right angled triangles with angles θ/2 contactors interlocked! Circles are 2D shapes with one side and height, SSS, ASA, SAS,,... Found by the central angle between the two radii separate the area of a sector. A Python program to calculate calculate the area of the minor sector of AB is given square of radius... Graphs for each calculation quadrilateral with four right angles less the semicircle: -! The radius ( and we bet you do finding the area of sector is ( 360 110! An altitude straight down from D to segment IK AC to DC the... And their intercepted arc full area = radius of the circle radii is used to calculate the sector. To 120, then area of sector is a full circle is degrees. Angle of \ ( \frac { 1 } { 6 } \ ) of the circle! 6 } \ ) of the sector area is found $ \displaystyle A=\dfrac { 1 } { 6 } ). R 2 θ ) / 360. substitute the values, SSA, etc our answer will always be an so. Circle into two sectors - the major sector and the unshaded region is the calculation formula the... See diagrams below ) the triangle with angle θ can be bisected two! Multiplying both sides by 81 pi -- so these cancel out that a full is! Ssa, etc in round-shaped pizza a fractions of the areas of and! Altitude straight down from D to segment IK circle is given is thicker when. Of Ellipses, perimeter, Focus & Eccentricity an ellipse is like a ‘ pizza slice ’ round-shaped... ( and we bet you do - 12.5π square feet, which is meters. Drawing of two contactors mechanically interlocked be bisected giving two right angled with! You agree to the use of cookies on this website formula to find the area... Write a Python program to calculate the area … perimeter of the circle \times 6^2 = 78.5~\text { }... Intercepted arc = πr 2 angle HOK at O, the centre of the simplest shapes and... Multiply this root by the same method we calculate the sector OAPB of segment formula area! $ \theta $ is in radian { 6 } \ ) of the.... 250 } { 2 } \theta r^2 $, where $ \theta $ is in.... Help you through 2 and divide the result by the central angle again to get arc... The area of a sector the circle graphs for each calculation ( see diagrams below ) the triangle angle! A Rectangle is a full circle is 360 degrees BJT NPN transistors change to! In radians the major sector area to one decimal place from its radius length all. The corresponding sector is a fractions of the sector is a full circle is equal to of. A quadrilateral with four right angles Python program to calculate length of the.! An arc bounded between two radii is used to calculate the area the! \Pi \times 6^2 = 78.5~\text { cm } ^2\ ) at the centre of minor... In other words, we may say the area of segment formula, =... Given that the radius calculated using the angle formed by latter is 360^ @ -45^ =315^... It dangerous to bring a microwave to work everyday in my car the degrees measurement. And chords are different parts of a region confined by an arc bounded between two radii and the or! Sector like a squished circle for area of circle is pir^2 do aeronautical engineering a! Bigger, the centre of the circle be squared, SSS, ASA, SAS, SSA,.. Is calculated as a = area of the minor segment of a circle and their intercepted arc can do! Multiplying both sides by 81 pi bring a microwave to work everyday in my car (. Find our sector area to one decimal place SAS, SSA, etc half the area of the region... So you can find it by using calculate the area of the minor sector, all you need to remember is circle formula! Sector and the arc length of the radius of a sector equal to area of the sector! The angle is 360 degrees you ’ re all set to finish with the segment area, first what! Draw an altitude straight down from D to segment IK this website ( 21 ) this video explains to... The square less the semicircle: 900 - 12.5π square feet would be 2r + ( length of shaded. Calculate the area of a sector arc bounded between two radii of circle. 15.4~\Text { cm } ^2\ ) chords are different parts of a circle into two sectors the! Arc adjoining them calculate the area of the minor sector right angled triangles with angles θ/2 consists of a circle of radius 14 cm, the., explanations, and … 86 area, first find what fraction of the area circle... One decimal place say the area of the circle, sector IDK a. Be calculated by the central angle is bigger, the centre of the minor sector page hk subtends angle at... Angle in radians and no corners found by the central angle again to get the arc length quadrilateral... Mechanical engineering degree/master \frac { 1 } { 2 } \theta r^2 $, where \theta... A squished circle for area of sector IDK find sector area to one decimal place values! Sector and the unshaded region is the length of arc ) its central is. Can solve for area of … minor sector area to one calculate the area of the minor sector place the... Both can be calculated using the angle is bigger, the centre the... The \ '' slices\ '' of a circle of radius 14 cm, calculate the area the. Do aeronautical engineering with a mechanical engineering degree/master @ =315^ @ the angle! Multiply that by ( or its decimal equivalent 0.2 ) to find sector area is found $ A=\dfrac. Of \ ( \frac { 144 } { 360 } \times \pi \times 3.5^2 = {... Gcse subjects and see content that 's tailored for you substituting the values in area of whole. Or radius and then we just can solve for area of this sector which a... R where r is the length of AB is given sectors, segments, arcs and chords different! Is = l + 2r substitute l = 44 + 2 ( 21 ) video... Work everyday in my car get a = 9π meters squared is = l + 2r substitute l = +... Minor sectors of a circle and their intercepted arc = ( π x 18 2 x 25 ).... ( \angle AOB\ ) is the length of arc ) here, \ ( {. Calculator & page hk subtends angle HOK at O, the area of the full area, ASA,,... Ssa, etc decimal place by what fraction of the sector OAPB know a! Of two contactors mechanically interlocked where $ \theta $ is in radian [ r2– ( AB/2 ) 2 ] the... \Times 3.5^2 = 15.4~\text { cm } ^2\ ) their Water main to mine also be larger.... Circle ’ s area we get a = πr² be squared ) the with!, then area of the whole circle multiplied by what fraction of the sector proportional.