Question

the diameter of a semicircle is 4 inches. what is the semicircle’s radius?

d=4 in

inches

Explanation:

Step1: Recall radius-diameter relation

The radius $r$ of a circle is half its diameter $d$, so $r = \frac{d}{2}$.

Step2: Substitute given diameter value

Substitute $d=4$ inches into the formula:
$r = \frac{4}{2}$

Answer:

2 inches