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A circular ring is to be stamped out with a hole in the middle. The hole will have a diameter of 42 inches as shown in the picture below. About how big is the area of the ring?
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A circular ring is to be stamped out with a hole in the middle. The hole will have a diameter of 42 inches as shown in the picture below. About how big is the area of the ring?

User Duc Vu Nguyen
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2 votes
The area is Pi times 21 squared
User Chyyran
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