Can someone help me find the area of this decagon?

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asked Jan 28, 2022 90.9k views

4 votes

Can someone help me find the area of this decagon?

Mathematics
high-school

Cezar Augusto asked

by Cezar Augusto

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1 Answer

10 votes

Explanation:

the given height is also the radius of the inscribed circle and the formula for the area is S=2r^2*sqrt(5*(5-2sqrt5))=490*tan18 which roughly rounds to 156.8

Bob Jacobsen answered Feb 3, 2022

by Bob Jacobsen

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