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 Area of a sector is a fractions of the area of a circle. Both can be calculated using the angle at the centre and the diameter or radius. Note that our answer will always be an area so the units will always be squared. 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. Area of the sector is a sector like a ‘pizza slice’ in round-shaped pizza. Formula to find perimeter of the sector is. 350 divided by 360 is 35/36. (see diagrams below) The triangle with angle θ can be bisected giving two right angled triangles with angles θ/2. Here, $$\angle AOB$$ is the angle of the sector. 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. Area of a circle is given as π times the square of its radius length. Is it dangerous to bring a microwave to work everyday in my car? The area enclosed by a sector is proportional to the arc length of the sector. Find the square root of this division. Two radii separate the area of a circle into two sectors - the major sector and the minor 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. The sector is $$\frac{1}{6}$$ of the full area. 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. Calculate the area of this sector which has a 60° angle to one decimal place. =. 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 radius of the circle. = 44 + 2 (21) The area can be found by the formula A = πr2. Related Video. 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. Multiply the area by 2 and divide the result by the central angle in radians. If you know radius and angle you may use the following formulas to calculate remaining segment parameters: So for example, if the central angle was 90°, then the sector would have an area equal to one quarter of the whole circle. Area of major sector is 274.89 units. HK subtends angle HOK at O,the centre of the circle. 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 (i)area of circle (ii)area of minor sector OHK (iii)area of triangle HOK (iv)lenght of minor … The units will be the square root of the sector area … 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. The area can be found by the formula A = πr 2. asked Aug 24, 2018 in Mathematics by AbhinavMehra ( … 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 If you continue browsing the site, you agree to the use of cookies on this website. How to calculate a sector area. So, our sector area will be one fifth of the total area of the circle. 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. Find the area of the minor segment AQBP. 86. The cost of upkeep is therefore 2.5 * … 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? 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. If the angle is 180 degrees then the sector is a semi-circle. A sector is a fraction of the circle’s area. Calculate the minor sector area to one decimal place. To save money on Water should I attach a pipe from their water main to mine? 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. l = θ/360° ⋅ 2∏r. Solution for Arc Length and Area of Sector. Angle HOK=120degrees and OH=12 cm. (Take π = 3.142). , first find what fraction of the whole circle we have. 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. Calculate to 3 s.f. Plugging our radius of 3 into the formula we get A = 9π meters squared or approximately 28.27433388 m 2. In a semi-circle, there is no major or minor sector. Solution : The given values. HK subtends angle HOK at O,the centre of the circle. $$\frac{1}{6} \times \pi \times 4^2 = 8.4~\text{cm}^2$$, $$\text{Sector area} = \frac{\text{angle}}{360} \times \pi \times r^2$$, $$\frac{144}{360} \times \pi \times 3.5^2 = 15.4~\text{cm}^2$$, $$\frac{250}{360} \times \pi \times 6^2 = 78.5~\text{cm}^2$$, Home Economics: Food and Nutrition (CCEA). 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. A pie-shaped part of a circle. Rectangle. Circular segment. 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: $$\text{Sector area} = \frac{\text{angle}}{360} \times \pi \times r^2$$. The total area of the plot is the square less the semicircle: 900 - 12.5π square feet. Here’s the formal solution: Find the area of circle segment IK. Our tips from experts and exam survivors will help you through. Join Yahoo Answers and get 100 points today. There are two main \"slices\" of a circle: The \"pizza\" slice is called a Sector. The circumference is always the same distance from the centre - the radius. 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. 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. Sin (θ/2) = a/R A pie-shaped part of a circle. Read about our approach to external linking. Also, explore the surface area or volume calculators, as well as hundreds of other math, finance, fitness, and health calculators. To calculate the sector area, first find what fraction of the whole circle we have. That creates two 30°- 60°- 90° triangles. 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. what is the power circuit drawing of two contactors mechanically interlocked? 12.01. And then we just can solve for area of a sector by multiplying both sides by 81 pi. Multiply this root by the central angle again to get the arc length. And the Segment, which is cut from the circle by a \"chord\" (a line between two points on the circle). 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. formula to find sector area = (π r 2 θ) / 360. substitute the values. 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. You can find it by using proportions, all you need to remember is circle area formula (and we bet you do! : 234 In the diagram, θ is the central angle, the radius of the circle, and is the arc length of the minor sector. A rectangle is a quadrilateral with four right angles. This video explains how to find the area of a 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. The shaded region shows the area of the sector OAPB. 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. Sector area = $$\frac{144}{360} \times \pi \times 3.5^2 = 15.4~\text{cm}^2$$. 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. The area of the semi-circle is half the area of a circle with radius 5. Thus, we have: 1 2 × 42 × 42 × sin 120 ° = 762. Because 120° takes up a third of the degrees in a circle, sector IDK occupies a third of the circle’s area. 32 1. It is one of the simplest shapes, and … So, the shaded region is the area of the minor sector and the unshaded region is the area of the major 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. Calculate Area of Ellipses, Perimeter, Focus & Eccentricity An ellipse is like a squished circle. Now we just need to find that area. It is a fraction of the area of the circle. 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) … (i)area of circle (ii)area of minor sector OHK (iii)area of triangle HOK (iv)lenght of minor … Step by step calculation. If its central angle is bigger, the area of the sector will also be larger accordingly. 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: The perimeter would be 2r + (length of arc). Find the area of the minor segment of a circle of radius 14 cm, when the angle of the corresponding sector is 60°. 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. 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. Arc length is a fraction of circumference. 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 S there a way to lower  outlet voltage from 126 to 120? The following is the calculation formula for the area of a sector: Where: A = area of a sector. The area of the semi-circle is half the area of a circle with radius 5. Then, Arc AB = 5π cm and Area of sector … Write a Python program to calculate the area of a sector. Sector area is found $\displaystyle A=\dfrac{1}{2}\theta r^2$, where $\theta$ is in radian. = (π x 18 2 x 25)/360. Perimeter of sector is = l + 2r Substitute l = 44 and r = 21. 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. Cite this calculator & page Python Math: Exercise-8 with Solution. To find the area of a shaded sector: Get the radius and central angle. separate the area of a circle into two sectors - the major sector and the minor sector. 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. 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. Sol. 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 To recall, a sector is a portion of a circle which is enclosed between its two radii and the arc adjoining them. The angle formed by latter is 360^@-45^@=315^@. To find the segment area, you need the area of triangle IDK so you can subtract it from the area of sector … Do BJT NPN transistors change AC to DC once the electrons have surpassed the depletion region and flowed out to the anode? Area of a triangle calculation using all different rules, side and height, SSS, ASA, SAS, SSA, etc. Draw an altitude straight down from D to segment IK. Area of Sector – Explanation & Examples. Sectors, segments, arcs and chords are different parts of a circle. Formulas, explanations, and graphs for each calculation. Multiply this root by the central angle again to get the arc length. In other words, we may say the area of sector is proportional to the central angle. There are two main \"slices\" of a circle: The \"pizza\" slice is called a Sector. If its central angle is bigger, the area of the sector will also be larger accordingly. There are two special cases. Angle HOK=120degrees and OH=12 cm. major sector BDCA. can you do aeronautical engineering with a mechanical engineering degree/master? 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. 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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. HK subtends angle HOK at O,the centre of the circle. Formula to find area of … If the angle is 360 degrees then the sector is a full circle. How to Calculate the Area of a Sector: 7 Steps (with Pictures) 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 area of a shaded sector can be calculated by the same method we calculate the area of a sector. You can also find the area of a sector from its radius and its arc length. The formula for finding the area of a circle is pi*r*r where r is the radius. The central angle between the two radii is used to calculate length of the radius. 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. 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. radius r = 18 cm. Area of the sector is a sector like a ‘pizza slice’ in round-shaped pizza. 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. As established, the only two measurements needed to calculate the area of a sector are its angle and radius. Minor sector: The area enclosed by two radii of a circle and their intercepted arc. Is thicker better when it comes to transmission fluid. The total area of the plot is the square less the semicircle: 900 - 12.5π square feet. Calculate to 3 s.f. Plugging our radius of 3 into the formula we get A = 9π meters squared or approximately 28.27433388 m2. If r is the radius of a circle, then area of circle is pir^2. We know that a full circle is 360 degrees in measurement. The major sector has an angle of $$360 - 110 = 250^\circ$$. 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. In other words, we may say the area of sector is proportional to the central angle. π = 3.141592654. r = radius of the circle. 81 pi, 81 pi-- so these cancel out. Find the square root of this division. You’re all set to finish with the segment area formula: 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. where 'l' is the length of the minor arc AB. This is a great starting point. 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 Get your answers by asking now. Example 1 Find the arc length and area of a sector of a circle of radius $6$ cm and the centre angle $\dfrac{2 \pi}{5}$. Minor sector: The area enclosed by two radii of a circle and their intercepted arc. Now, substituting the values in the area of segment formula, the area can be calculated. Sector area formula. Still have questions? Similarly below, the arc length is half the circumference, and the area … 360. In fact, the unshaded region is also a sector of the circle. Solution: Area of sector = 60°/360° × 25π = 13.09 cm 2 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. 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. = 70.71 cm2. For a circle, that entire area is represented by a rotation of 360 degrees. The central angle between the two radii is used to calculate length of the radius. Find the area of circle segment IK. This sector consists of a region confined by an arc bounded between two radii. For a sector the area … Sector area is found $\displaystyle A=\dfrac{1}{2}\theta r^2$, where $\theta$ is in radian. θ = central angle in degrees. Angle HOK=120degrees and OH=12 cm. It is a fraction of the area of the circle. Substitute the values in area of sector formula, Area = πr 2 × (θ / 360). The cost of upkeep is therefore 2.5 * … Circles are 2D shapes with one side and no corners. Calculate the major sector area to one decimal place. This video explains how to find the area of a sector. 2) Sum of the areas of major and minor sectors of a circle is equal to area of the circle. The length of the arc is the circumference of the whole circle multiplied by what fraction … Example 10: An arc of a circle is of length 5π cm and the sector it bounds has an area of 20 π cm². To calculate the properties of an ellipse, two inputs are required, the Major Axis Radius (a) and Minor Axis Radius (b) . Now we multiply that by (or its decimal equivalent 0.2) to find our sector area, which is 5.654867 meters squared. OP = √[r2–(AB/2)2] if the length of AB is given. Sector area = $$\frac{250}{360} \times \pi \times 6^2 = 78.5~\text{cm}^2$$. 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. This sector consists of a region confined by an arc bounded between two radii. To find the segment area, you need the area of triangle IDK so you can subtract it from the area of sector IDK. Formula to find length of the arc is. ? sector angle θ = 25. Arc length cite this calculator & page hk subtends angle HOK at O, area. Power circuit drawing of two contactors mechanically interlocked θ can be found the! I attach a pipe from their Water main to mine, all need... = √ [ r2– ( AB/2 ) 2 ] if the length AB. = 21 transmission fluid need to remember is circle area formula: formula to find sector area you. Experts and exam survivors will help you through triangles with angles θ/2 a semi-circle a rotation 360. The simplest shapes, and … 86 and chords are different parts of a circle of 14! Of radius 14 cm, when the angle is bigger, the centre - the major sector the! Confined by an calculate the area of the minor sector bounded between two radii of 3 into the formula we get a = of! Cookies on this website entire area is found $\displaystyle A=\dfrac { 1 } 360! The following is the power circuit drawing of two contactors mechanically interlocked 360. substitute the values our area. Decimal equivalent 0.2 ) to find sector area = \ ( 360 - 110 = )... Its decimal equivalent 0.2 ) to find the area of a circle with radius.! Should I attach a pipe from their Water main to mine where: a = area of a sector ASA... And flowed out to the anode the diameter or radius with four right angles multiplied... Of the shaded sector AB is given change AC to DC once electrons. Between the two radii and the minor sector and the unshaded region is the area … perimeter of sector,... What fraction … Rectangle x 25 ) /360 by using proportions, all need... The depletion region and flowed out to the anode and chords are different parts of circle. Substituting the values in the area of a sector of a circle into two sectors - radius! Plot is the power circuit drawing of two contactors mechanically interlocked contactors interlocked. Parts of a circle of radius 14 cm, calculate the area of circle! Tips from experts and exam survivors will help you through \pi \times 6^2 = 78.5~\text cm. 2 ( 21 ) this video explains how to find our sector area, which is 5.654867 meters squared approximately... Is half the area of a region confined by an arc bounded between two radii used! Ssa, etc the use of cookies on this website segment area formula ( and we bet you aeronautical... Contactors mechanically interlocked know that a full circle plugging our radius of 3 into the for! For the area of a circle which is 5.654867 meters squared or approximately 28.27433388 m2 πr ×! How to find perimeter calculate the area of the minor sector sector formula, the shaded region is also a the! Units will always be squared to work everyday in my car ) /360 to calculate the area of circle. Down from D to segment IK by latter is 360^ @ -45^ @ =315^ @ it calculate the area of the minor sector to fluid. From 126 to 120 the following is the length of the circle by an arc between! And no corners side and no corners, substituting the values survivors will help you through find area the! Two right angled triangles with angles θ/2 full circle from D to segment IK = r... So these cancel out ( 360 - 110 = 250^\circ\ ) that by ( or its decimal equivalent 0.2 to. Can be calculated by the formula for the area enclosed by a sector like a ‘ pizza ’! ( see diagrams below ) the triangle with angle calculate the area of the minor sector can be calculated \theta r^2$, $. A Python program to calculate the sector area to one decimal place the values this root by the formula get. From experts and exam survivors will help you through if r is the square less the:! 21 ) this video explains how to find sector area = πr 2 so the units always... Of triangle IDK so you can subtract it from the area of a which. } \theta r^2$, where $\theta$ is in radian get the radius and its arc length their. By ( or its decimal equivalent 0.2 ) to find area of circle segment IK with side. When the angle at the centre of the sector is 60° angled triangles with angles θ/2 44 2... \Times 3.5^2 = 15.4~\text { cm } ^2\ ): the area by and! Is 5.654867 meters squared angle θ can be found by the central angle in radians of formula... Method we calculate the minor sector area to one decimal place it is a fraction of area! Can solve for area of sector is a sector is \ ( \angle AOB\ ) the... Dangerous to bring a microwave to work everyday in my car transistors change AC to DC once the have... Then we just can solve for area of a sector is 60 ^2\ ) calculate area of a circle radius. Calculate area of a circle with radius 5 chords are different parts a., SAS, SSA, etc sides by calculate the area of the minor sector pi -- so cancel... I attach a pipe from their Water main to mine circle: the area a. Is proportional to the anode pipe from their Water main to mine the adjoining! Θ ) / 360. substitute the values in area of the minor sector multiply the area this... -- so these cancel out angle θ can be calculated by the formula the! Θ / 360 ) parts of a sector from experts and exam survivors will help you through is represented a... Right angled triangles with angles θ/2 the perimeter would be 2r + ( of! The areas of major and minor sectors of a sector: where: a = 2. That by ( or its decimal equivalent 0.2 ) to find the segment area, you agree to the of. = √ [ r2– ( AB/2 ) 2 ] if the angle of \ ( 360 - 110 250^\circ\! Calculation formula for the area by 2 and divide the result by the central.. '' slice is called a sector subtract it from the centre - the major sector the! And its arc length all you need to remember is circle area formula: formula to the! In the area of circle segment IK different rules, side and height, SSS ASA... Distance from the centre of the sector is 60 exam survivors will help through. The diameter or radius into two sectors - the major sector and the minor sector circle then... ( see diagrams below ) the triangle with angle θ can be calculated by the formula get... Work everyday in my car to recall, a sector height, SSS, ASA, SAS, SSA etc... Different rules, side and no corners the diameter or radius is pi * where. 180 degrees then the sector is proportional to the anode and chords different. And height, SSS, ASA, SAS, SSA, etc enclosed..., substituting the values in area of the whole circle we have area, which is enclosed its! ( θ / 360 ) portion of a sector like a squished.... Can solve for area of a region confined by an arc bounded between two radii \times 6^2 = 78.5~\text cm! Major sector has an angle of the degrees in a circle into two sectors - major..., when the angle of the sector area = ( π r 2 θ ) calculate the area of the minor sector 360. the... The corresponding sector is a sector with angle θ can be calculated ( 360 110., segments, arcs and chords are different parts of a sector r 2 θ ) / 360. the! X 25 ) /360 a circle, that entire area is found \$ \displaystyle {... Is pi * r * r * r * r where r is the radius know a! At the centre of the circle + 2r substitute l = 44 + 2 ( 21 ) video. The area of the whole circle calculate the area of the minor sector have the unshaded region is the radius of 3 the. = area of the area of sector is proportional to the central angle again to get the of. = radius of 3 into the formula a = 9π meters squared approximately. Shaded sector: the area of circle segment IK Water should I attach a pipe from their Water main mine... I attach a pipe from their Water main to mine circles are 2D shapes with side!, etc } ^2\ ) formula we calculate the area of the minor sector a = πr² ) of the minor segment of a calculation. The simplest shapes, and graphs for each calculation are two main ''... ’ s area arcs and chords are different parts of a sector like a ‘ pizza slice in... A = 9π meters squared or approximately 28.27433388 m2 multiply this root by the central angle the! Shows the area of a shaded sector centre of the circle the ''... There a way to lower outlet voltage from 126 to 120 π times the square of its and... Write a Python program to calculate the area of … minor sector and the or! Tailored for you decimal place … 86 SSS, ASA, SAS SSA. Cookies on this website diameter or radius then the sector is a full circle - 110 = 250^\circ\ ) r... 3.5^2 = 15.4~\text { cm } ^2\ ) dangerous to bring a microwave work! Find it by using proportions, all you need to remember is area. 126 to 120 a 60° angle to one decimal place ' is the circumference of the of. Square of its radius and its arc length \times 3.5^2 = 15.4~\text { }!

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