Question

a circle has diameter 10. radius is:
5
1
2
10

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 $d=10$ into the formula:
$r = \frac{10}{2}$

Step3: Calculate the result

Perform the division:
$r = 5$

Answer:

5 (the orange box option)