# Geometry

calculate the surface area of a hemisphere with the radius 10 ft

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asked by Mary
1. SA = 2 * pi * r^2

SA = 2 * 3.14 * 10^2
SA = 6.28 * 100
SA = 628 sq. ft.

http://mathcentral.uregina.ca/QQ/database/QQ.09.07/h/nicholas4.html

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