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An umbrella you bought is shaped like a regular octagonal pyramid with a side length of four feet and a slant height of feet. Estimate the amount of fabric that the umbrella has.
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An umbrella you bought is shaped like a regular octagonal pyramid with a side length of four feet and a slant height of feet. Estimate the amount of fabric that the umbrella has.

User Remco Poelstra
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1 Answer

5 votes
the complete question in the attached figure

we know that
[amount of fabric]=8*[area of lateral triangle side]
area of lateral triangle side=(1/2)*4*5----> 10 ft²
so
[amount of fabric]=8*[10]----> 80 ft²

the answer is
80 ft²
An umbrella you bought is shaped like a regular octagonal pyramid with a side length-example-1
User Arahaya
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