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max
max asked in Science & MathematicsMathematics · 4 years ago

Geometry help?

How would I find the area of a regular octagon with diagonal through the center of 18?

1 Answer

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  • alex
    Lv 7
    4 years ago

    area of 1 triangle = (1/2)(9^2)sin(45) = (81sqrt2)/4

    ---> area of octagon=162 sqrt2

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