what is the area of a 8 sided polygon with each side being 11 inches

The answer is 584.2in but i don't know how to get to it
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1 Answer

s=11inches

Area of an octogon=2s^2(1+sqrt2)

                              =2(11^2)(1+1.414)

                              =2(121)(2.414)

                              =584.188=584.2 sq.inches
by Level 8 User (32.3k points)

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