SOLUTION: formula for the surface area of half a cylinder

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Question 989500: formula for the surface area of half a cylinder
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
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Area of ends=2 half circles=2%281%2F2%29%28pi%29r%5E2=%28pi%29r%5E2
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Area of flat side=diameter x height=2rh
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Area of curved side=%281%2F2%29%28pi%29diameter%28h%29=%28pi%29rh
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Surface area=(area of ends)+(area of flat side)+(area of curved side)
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Surface area=%28pi%29r%5E2%2B2rh%2B%28pi%29rh
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Surface area=r%28%28pi%29r%2B2h%2B%28pi%29h%29