Tuesday

September 2, 2014

September 2, 2014

Posted by **rahul patel** on Wednesday, January 25, 2012 at 2:03pm.

- trig -
**Kate**, Wednesday, January 25, 2012 at 2:18pmThis is not trig.

Anyway, C=2(pi)r. If the circumference is 12.31, then the radius is 12.31/[(pi)r] = 1.96. If the central angle is 1/4 of a revolution, then the central angle measure is 90 degrees.

The area of a sector is a piece of the area of the entire circle:

A=(pi)r^2 * central angle measure/360

A=(pi)1.96^2 * 90/360

A=3 m^2

**Answer this Question**

**Related Questions**

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 ...

math - a circular pizza box logo has a sector with a central angle of 80 degrees...

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...

math - A circular room has radius equal to 40 feet. Marble is to be laid on a ...

math - A sector in a circle of radius 8.1 m has an area of 53.5 m^2. The ...

math:mensuration plane shapes - a cone that has a base diameter-8cm and height-...

Geometry - The measure of the central angle of a sector of a circle is ...

pre-calc - Find an angle between 0 and 2ð that is coterminal with the given ...