alleahbethea199
04.03.2020 •
Mathematics
Find the area of a regular octagon with side length 8 cm. Round your answer to the nearest square centimeter.
A. 53 cm
B. 106 cm
C. 155 cm
D. 309 cm
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Ответ:
A=2(1+2)a2=2·(1+2)·82≈309.01934cm²
So the answer to this problem is D
Ответ: