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Homework Help: Trig polygon Question

  1. Dec 5, 2005 #1
    Hi guy's im havin trouble with this problem... can anyone help me out...A regular polygon of n sides is inscribed in a circle of radius r. if the area of the polygon is 2r^2 root 2 how many sides does it have
     
  2. jcsd
  3. Dec 5, 2005 #2
    Take the polygon has n sides. Now draw radius to each vertex of the polygon. we form n triangles whose area are equal. now use the formula that the area of a triangle ABC is given by 1/2absinC.
     
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