Question

The area of a circle is 16π cm2. What is the circle's circumference?

Answer 1

To work out a circle's circumference you have to use this formula:
C=2×π×r
circumference= 2 x pi x radius
to get the radius just half the diameter
hopefully this helped

Answer 2

Circumference of the circle is 25.12 cm

Explanation:

We are Given: Area of the circle = 16π cm²

We need to find Circumference of the circle.

let r be the radius of the circle.

Then,

Area of the circle = πr²

πr² = 16π

r² = 16

r = √16

r = 4 cm

Now, Circumference of the circle = 2πr = 2 × 3.14 × 4 = 25.12 cm

Therefore, Circumference of the circle is 25.12 cm.