##### Abby Garcia, Abby- Resident Noodle Expert

Hello there! By knowing that a circle is 20 inches, you know the diameter. The diameter is 20. In order to find the radius, you will need to find the square root of 20, that will be your radius.

D= r^2

Hello there! By knowing that a circle is 20 inches, you know the diameter. The diameter is 20. In order to find the radius, you will need to find the square root of 20, that will be your radius.

D= r^2