Posted by **sita** on Wednesday, October 5, 2011 at 5:01pm.

find the area of the sector with 80 degree angle and radius=8

- geometry -
**Steve**, Wednesday, October 5, 2011 at 6:18pm
Area = 1/2 r² θ

Sound familiar? The whole circle has 2π radians, so the area = 1/2 * 2π r^2 = πr^2

Anyway, you have 80°, which is 80*/360 * 2π = 2π/9

So, the area is 1/2 * 2π/9 * 8² = 22.34

## Answer This Question

## Related Questions

- Geometry - Trying to help my Autistic child with geometry. Need a simple step by...
- Geometry - Infinitely many different sectors can be cut from a circular piece of...
- geometry - 11. Infinitely many different sectors can be cut from a circular ...
- Geometry - The circumference of a circle is 20 pi cm. Find diameter, radius, and...
- trigonometry - please check my answers. 1.Find the area of the sector of a ...
- geometry - FIND THE LENGTH OF THE RADIUS OF THE CIRCLE IS 9cm. THE ARC OF THE ...
- pre-calc - Find an angle between 0 and 2ð that is coterminal with the given ...
- TRIG HELP ASAP - I really need help on this problem. A sector has area of 15 in^...
- trig - In a circle of radius 12 inches, a sector is formed by a central angle of...
- How do i do this maths question?? - A sector of a circle with radius r cm ...

More Related Questions