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richkaryn
richkaryn asked in Education & ReferenceHomework Help · 1 decade ago

A regular polygon of 18 sides has external angles which measure how many degrees? - I need help with homework?

3 Answers

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  • hayharbr
    Lv 7
    1 decade ago
    Favorite Answer

    No matter how many sides there are, the exterior angle measures always add up to 360. So divide 360 by 18 to find each angle's measure.

  • yellowskinnedguy
    1 decade ago

    the formula for the internal angles is

    180(N-2), where N is the number of sides

    180(18-2)

    180(16)=2880

    So the interior angles of an 18 sided regular polygon is 2880

    divide 2880 by 18 to find the measurement of one interior angle

    160 is the measure of on interior angle, 360-160=200

    200 times 18 =3600

    The sum of a regular polygon with 18 side's exterior angles is 3600

    I have a feeling this is wrong

  • Baby V
    1 decade ago

    That is confusing for me sense i'm a 6th grader

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