Posted by **Courtney** on Sunday, April 15, 2012 at 6:18pm.

The measure of the central angle of a sector of a circle is 90degrees. The arc length of the sector is 3(pie) cm. What is the radius of the circle?

- Geometry -
**Bosnian**, Sunday, April 15, 2012 at 6:24pm
The circumference of the circle = 2 r pi

The measure of the sector 90 ° = ( 1 / 4 ) 2 r pi = r pi / 2

r pi / 2 = 3 pi Divide both sides by pi

r / 2 = 3 Multiply both sides by 2

r = 2 * 3

r = 6 cm

- Geometry -
**Courtney**, Sunday, April 15, 2012 at 6:26pm
Thanks so much!

- Geometry -
**Alondra**, Sunday, May 8, 2016 at 10:04pm
A circke has an arc length of 10 feet. The central angle formed os 60°. What is the area of the sector?

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