Question

What is the circumference of a circle with a diameter of 40 in?

Answer 1

126 in²

Explanation:

C = πd when the diameter is known. If the diameter is 40 in, then the radius is half that, or 20 in.

Then the circumference of a circle with a diameter of 40 in is

C = (40 in)π. This works out to approximately 126 in²

Answer 2

the answer is the pink one. 125.6