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    Question

    What will be the measure of each interior angle of a

    regular polygon whose sides are 20.
    A 168° Correct Answer Incorrect Answer
    B 140° Correct Answer Incorrect Answer
    C 156° Correct Answer Incorrect Answer
    D 162° Correct Answer Incorrect Answer

    Solution

    Let each ineterior angle of the regular polygon of N sides is I & each exterior angle of the same polygon is E. So E = 360/N = 360/20 = 18 So I + E = 180 or I = 180 - 18 = 162°

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