Question

the radius of a circle is 7 cm. find its circumference in terms of $pi$.

Explanation:

Step1: Recall circumference formula

The formula for the circumference of a circle is $C = 2\pi r$, where $r$ is the radius.

Step2: Substitute given radius

Substitute $r = 7$ cm into the formula:
$C = 2\pi \times 7$

Step3: Simplify the expression

Calculate the product of 2 and 7:
$C = 14\pi$

Answer:

$14\pi$ cm