Question

if the diameter of a circle is 5, what is its circumference? a. $2.5pi$ b. $pi$ c. $5pi$ d. 10

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 \(d = 5\), substitute into the formula: \(C=\pi\times5 = 5\pi\)

Answer:

C. \(5\pi\)