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4 November, 03:13

Manuel wants to buy a window shade to cover the window and frame shown. the window is in the shape of a regular octagon. the radius of the window, including the frame, is 2 ft, and the measure of each edge of the octagonal frame is 1.52 ft. what is the approximate area of the window that needs to be covered, including the frame?

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  1. 4 November, 06:02
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    The area of the window may be determined through the equation,

    A = 0.5 aP

    where A is area, a is apothem, and P is the perimeter.

    Given that the side measures 1.52 ft each, the perimeter of the octagon is 12.16 ft. The apothem is calculated by the equation,

    a = (cos 360 / (8x2)) (2 ft) = 1.8477 ft

    Thus, the area of the octagon is,

    A = 0.5 (1.8477 ft) (12.16 ft)

    A = 11.23 ft²
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