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Math Help - [SOLVED] Regular Hexagon Inscribed in a Circle

  1. #1
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    [SOLVED] Regular Hexagon Inscribed in a Circle

    A regular hexagon is inscribed in a circle with a diameter of 10.36 cm. Find the area of the hexagon.
    Help? I can't remember some of the rules in Geometry. I'm trying to solve this using the Laws of Cosine and Sine, as I'm in Pre-Cal, but I can't seem to figure it out.
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  2. #2
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    Quote Originally Posted by chrozer View Post
    Help? I can't remember some of the rules in Geometry. I'm trying to solve this using the Laws of Cosine and Sine, as I'm in Pre-Cal, but I can't seem to figure it out.
    Look at this webpage.
    Formula #4 answers the question.
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  3. #3
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    Quote Originally Posted by Plato View Post
    Look at this webpage.
    Formula #4 answers the question.

    =nsin(180/n)cos(180/n)(r^2)
    =6sin(180/6)cos(180/6)(5.18^2)
    =69.713 square centimeters

    ? is that right?
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