3 years ago

Find the area of of a regular octagon with side length 20 cm.

Mathematics

1 answer:

Alla [95]3 years ago

8 0

A=2(1+ $\sqrt{2}$ )a^2=2·(1+ $\sqrt{2}$ )·20^2≈1931.37085cm²

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denis-greek [22]

Answer:

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2 years ago

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navik [9.2K]

Answer:

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3 years ago

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Answer:

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