Question

Find the circumference of a circle with a diameter of 20 inches.

Answer 1

62.8319 in

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Answer 2

The circumference of a circle can be found with this equation:

C = 2$\pi$r

"r" is the radius, which is half of the diameter.

The diameter is 20.

20 ÷ 2 = 10

Your radius is 10. Now that you know the radius, you can plug it into the equation:

C = 2$\pi$r

C = 2$\pi$(10)  Multiply 2 and 10 together

C = 20$\pi$

Your circumference is:

20$\pi$ inches  or  62.8318530718 inches(you should round it if you want lol)