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Grade 11 Volume CCSS: HSG-MG.A.1
An umbrella is shaped like a hemisphere when open. It is made of a metal handle, metal arms that allow the umbrella to open and close, and the nylon canopy. If the distance from the handle to the edge of the umbrella when open is 2.5 ft, how much nylon is used in the umbrella? Round the answer to the nearest square foot.
- 25 ft2
- 39 ft2
- 79 ft2
- 196 ft2