What is the circumference of a circle with an area of 36π?

Quantity A: The circumference of a circle with radius

Quantity B: The area of a circle with a diameter one fourth the radius of the circle in Quantity A

Which of the following is true?

Circle A has an area of . What is the perimeter of an enclosed semi-circle with half the radius of circle A?

Which is greater: the circumference of a circle with an area of , or the perimeter of a square with side length inches?

Circle has a center in the center of Square .

The area of Square is .

What is the circumference of Circle ?