Thursday

October 23, 2014

October 23, 2014

Posted by **christina** on Wednesday, October 25, 2006 at 5:32pm.

circumference = 2*pi*r

area = pi*r^2

Set them equal and solve for r.

thanks! i understand it now!

2*3.14*r=3.14*r^2

6.28*r=3.14*r^2

r=3.14

Is that right? It doesn't seem to be.

2*3.14*r=3.14*r^2

6.28*r=3.14*r^2

r=3.14

Is that right? It doesn't seem to be.

(6.28/3.14)*r=(3.14/3.14)r^2

2*r=1*r^2

Now divide both sides by r

2*(r/r)=(r^2/r)

2*1=r

2=r

2*pi*r=pi*r^2

The pi cancels since it is on both sides.

Divide both sides by r to obtain

2=r

I hope this helps.

thanks, it did help!!

the diameter of a bicycle wheel is 26 in. How far will you travel after one complete turn of the wheel?

**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 ...

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

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

Geometry-8th gr - The Circumference of a circle is equal to the area of the ...

Circumference - Find the circumference and area of cirlce with a radius of 3 ...

Circumference and Area of Circles - can someone help me with these:Find the ...

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