ANSWER: 643.7
We have to find the areas of both circles, and subtract the area of the smaller one from the bigger one. That will be the answer.
Area of a circle = pi times radius^2
So
Small circle:
A = 3.14 x 18 x 18
A = 1,017.36
Bigger circle:
A = 3.14 x 23 x 23
A = 1,661.06
So then we do:
1,661.06 - 1,017.36 which equals 643.7. That’s the area of the ring.
I hope this helped! (:
