surface areas Watch

pazzaz33
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#1
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#1
how to find the surface area of a prism
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Acsel
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Work out the surface area of each face. Add them all together.
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begbie68
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For a right prism
Surface Area = 2 x (cross sectional area) + (perimeter of cross section) x depth

This way means doing about the same number of sums, but fewer products compared with Acsel's way (which is more of an obvious way)
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