### Home > MC1 > Chapter 10 > Lesson 10.1.2 > Problem 10-23

10-23.

Circumference is equal to 2*πr*, or the diameter times pi.

C = 8π, or approximately 25.13 meters.

Remember that area is equal to *πr*^{2}. What is the radius of this circular trampoline if the diameter is 8 meters?

(Remember that the radius is equal to half of the diameter.)