... 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

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*r1 Answers · Science & Mathematics · 28/09/2008

... 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

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

...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

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

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

**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 >==========< ANSWER1 Answers · Science & Mathematics · 03/08/2011

... 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

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