Question

What is the circumference of a circle when the area is 64pi mi^2

Answer 1

Answer:

16(pi)

Step-by-step explanation:

If the area of a circle is 64 pi, what is its circumference?

Area = (pi)r^2

Substitute 64(pi) in place of Area

64(pi)=(pi)r^2

r=8

Circumference = 2(pi)r

Substitute 8 in place of r to get:

=2(pi)8

Circumference =16(pi)

Answer 2

So the circumference formula is pi time 2r

The area of the circle is 64

Area of a circle form= pi x r^2

So we know pi number is 3.14

64/3.14 = 20.38

So r*2 mean the radius is a number and raised square

4.5x4.5x3.14 = 63.5 round is 64


Circumference is

3.14x2x3.14= 28.26