Question

circle
7 cm
radius = ______
diameter = ______ 7

Explanation:

Step1: Identify given value

The given length is the radius: $r = 7\ \text{cm}$

Step2: Calculate diameter

Diameter is twice the radius: $d = 2r$
$d = 2 \times 7 = 14\ \text{cm}$

Answer:

radius = $7\ \text{cm}$
diameter = $14\ \text{cm}$