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15 November, 12:47

The sum of the measure of the interior angles of a polygon is 1980°. What polygon is it? 10-gon 11-gon 12-gon 13-gon

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  1. 15 November, 14:03
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    13-gon

    Step-by-step explanation:

    The sum of the interior angles of a polygon with n sides is:

    S = 180° (n - 2)

    If S = 1980°, then:

    1980° = 180° (n - 2)

    11 = n - 2

    n = 13
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