The area of a circle is 16π cm2. what is the circle's circumference?
2π cm
4π cm
8π cm
16π cm

Circumference of circle =  8π cm.

Step-by-step explanation:

Given : The area of a circle is 16π cm².

To find : What is the circle's circumference.

Solution : We have given that area of a circle is 16π cm².

Area of circle = π ( radius)²

Plug the value

16π =  π ( radius)²

On dividing by π both sides

16 =  ( radius)²

Taking square root both sides

Radius  =  4 cm .

Circumference of circle =  2 * π * radius .

Circumference of circle =  2 * π * 4 .

Circumference of circle =  8π cm.

Therefore, Circumference of circle =  8π cm.

part a: 1.08

part b: 27.59