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netineya [11]
3 years ago
14

Does someone know the answer

Mathematics
1 answer:
natulia [17]3 years ago
3 0

The area of a regular octagon is equal eight times area of a triangle with the base 11 and the height 13.28:

A_8=8\cdot\dfrac{1}{2}\cdot11\cdot13.28=584.32

The area of a square:

A_4=11^2=121

The area of the shaded region:

A=A_6-A_4\to A=584.32-121=463.32\approx463

Answer: D. 463 square units.

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