Question

if the diameter of a circle is 16 in, what is its circumference?

Explanation:

Step1: Recall the formula for circumference

The formula for the circumference \( C \) of a circle is \( C = \pi d \), where \( d \) is the diameter.

Step2: Substitute the given diameter

Given \( d = 16 \) in, substitute into the formula: \( C=\pi\times16 = 16\pi \) in. If we use \( \pi\approx3.14 \), then \( C\approx16\times3.14 = 50.24 \) in.

Answer:

The circumference is \( 16\pi \) inches (or approximately \( 50.24 \) inches).