Posted by **Americal** on Tuesday, March 15, 2011 at 7:06pm.

If the diameter of a wheel is 10 inches. What is the radius and how would I find its circumference. Thanks I do understand that the radius is twice the circumference.

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**MathMate**, Tuesday, March 15, 2011 at 8:08pm
Not quite!!

The diameter is twice the radius, and the circumference is π * diameter, or equivalently, 2&pi * radius.

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