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11 June, 14:07

Find the area of the regular decagon with a side measure of 4cm

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  1. 11 June, 17:39
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    By using the formula for the area of a regular decagon: (a=side)

    A = (5/2) * 4²*[√5 + (2√5) ]

    A ≈ 123.11cm²
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