How do you measure circumference?

Answer 1

You measure circumference by multiplying the diameter by pi. If it gives you the radius, multiply the radius by 2 to get the diameter then multiply it by pi.

Here are some helpful formulas:

Area: A=Pi r2

Diameter (If given radius) D= r x 2

Radius (If given diameter) R=d/2

Circumference= d x pi

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