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1. ### how do you find the area of a sector of a circle?

... by two radii of a circle and the arc the two radii subtend. The arc of the circle is equal in ... each r,the are of sector is simply area of entire circle times x/360...

2 Answers · Science & Mathematics · 19/05/2011

2. ### Question on proving area of a sector ?

take the internal angle to be t r+r+r(t)=100 A =0.5*r*r(t) from first equation you get r(t)=100-2r Substituting it into the second equation gives A =0.5*r*(100-2r) =50r-r*r

1 Answers · Science & Mathematics · 28/09/2008

3. ### What is the area of a sector with radius 4 and an angle of 18°?

... A = 16π Since you are trying to find the area of a sector , then the area is a percentage of the total area of the circle. In this case...

3 Answers · Science & Mathematics · 15/07/2012

4. ### Math question on area of a sector ?

360° is a full circle. 72° is 1/5 of a full turn of a circle. => 9π inches² is the total area . Area is πr² = 9π => r² = 9 i.e. r = 3 inches :)>

2 Answers · Science & Mathematics · 02/08/2012

5. ### How do you find the area of a sector ?

...circle is pi*r^2. so the area of any sector is just the equivalent fraction of the area . the full circle is 360 degrees...equivalent to 70/360 times the total area . A = theta/360 * pi * r^2 A = 70/360 * pi...

1 Answers · Education & Reference · 07/06/2013

6. ### How do you prove the area formula of a sector ?

Well, think about the formula for area giving a *full circle*. Here the central angle would be 2 pi. And the area would...

2 Answers · Science & Mathematics · 28/01/2008

7. ### How to calculate the area of a circle's sector ?

area of circle is pi.r² that is for 360 degrees ( 2pi ...theta / 2pi that is r² . theta / 2 when theta is = 1 radain area is r²/2 here r is 2 so answer is 4/2 = 2 sqcm

1 Answers · Science & Mathematics · 12/05/2012

8. ### Find the area of a sector ? Math!?

Sector arc-length = 20 cm radius, r = 10 cm Area of the sector = pi(r^2)*20 / 2pi*r Area = 10*r = 10*10 = 100 sq.cm >==========< ANSWER

1 Answers · Science & Mathematics · 03/08/2011

9. ### Find the area of a sector of a semicircle?

... you the fraction of the semicircle that the sector takes up. Then multiply by... pi*(radius^2), since that's the area of the whole semicircle. That is, half of a circle's area . The other option...

1 Answers · Science & Mathematics · 27/02/2017

10. ### How do you find the area of a shaded sector ?

Assuming a sector of a circle... find the area of the circle: A = pi r^2, where r = radius find the fraction of the circle that the sector is: example angle of secton/360 degrees or length of sector arc / circumference (c = 2 pi*r)

1 Answers · Education & Reference · 08/03/2011