Question

The area of a circle is 16π m². What is the circumference, in meters? Express your answer in terms of

π

Answer 1

C = 8π m

Explanation:

the circumference (C) of a circle is calculated as

C = 2πr ( r is the radius )

use the given area (A) and solve for r

A = πr² = 16π ( divide both sides by π )

r² = 16 ( take square root of both sides )

r =
`√(16)` = 4

then

C = 2π × 4 = 8π m