The sum of external angles of
quadrilateral is equal to the sum of its
internal angles.
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Step-by-step explanation:
Interior and exterior angle formulas: The sum of the measures of the interior angles of a polygon with n sides is (n – 2)180. If you count one exterior angle at each vertex, the sum of the measures of the exterior angles of a polygon is always 360°
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no this is wrong because sum of external angle =360° and sum of internal angle = 180°
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