Question

I just can't figure this out! Can you help me?

Answer 1

Answer:

31.4 cm

62.8 cm

Step-by-step explanation:

The radius of the inner circle is 5 cm.  The line from the edge of the outer circle to the edge of the inner circle is 5 cm.  Assuming that the center of the outer center is the same as the center of the inner circle, the radius of the outer should be 10 cm.

Use the formula for circumference since you have the radius.

Inner circle

C = 2πr

C = 2π(5)

C = 10π

C = 31.4 cm

Outer Circle

C = 2πr

C = 2π(10)

C = 20π

C = 62.8 cm