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The diameter of a circle is 20 centimeters. What is the circumference?Given the exact answer in simplest form._____ centimeters (pi, fraction)

The diameter of a circle is 20 centimeters. What is the circumference?Given the exact-example-1
User Crferreira
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The circumference of the circle using its diameter is


C=\pi* d

Since the diameter of the circle is 20 cm, then

d = 20

Substitute it in the rule


\begin{gathered} C=\text{ }\pi*20 \\ C=20\pi\text{ cm} \end{gathered}

The exact answer is 20 pi cm

User Islon
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