Sunday

December 21, 2014

December 21, 2014

Posted by **mark** on Tuesday, October 31, 2006 at 4:55pm.

Start with what you know. If you know the formula the area of a circle, and the formula for the circumference of a circle, then you can set them equal to each other...from there you should be able to get the radius!!

set A = pi * r^2 and C= 2*pi*r to eual each otherso u get pi*r^2 = 2*pi*r the pi's cancles and the the r^2 is reduced whuch gives r = 2

**Answer this Question**

**Related Questions**

math - the radius of a circle when the numeric values of the circumference and ...

math - the radius of a circle when the numeric values of the circumference and ...

Algebra - The Circumference and area of a circle of radius r are givin by 2 [pie...

math - Okay. So i'm doing this project for my geometry class about different ...

math - I'm asked to find the circumference of a circle to the nearest tenth and ...

Geometry - A circle with a radius of 1/2 ft is dilated by a scale factor of 8. ...

Algebra - The area of a circle is given by the formula A = pi*r^2 and the ...

Math - The area of a rectangle is shown below The area of the rectangle is 56 ...

Circumference,Radius, Diameter - What is the area of the circle if the radius is...

Algebra - The area of a circle is given by the formula A+pier^2, where r is the ...