The circumference of a circle is 31.4 inches. What is the circle's diameter? C=31.4 in Use 3.14 for .

We will use the circumference formula to find the radius and then multiply it by 2 to find the diameter.

C = 2πr

31.4 = (2) (3.14) (r)

31.4 = 6.28r

5 = r

So our radius is 5 in.

We can multiply it by 2 to get the diameter.

5*2 = 10

So the diameter is 10 inches

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this can be calc for a form