Providing that it's a regular pentagon then each exterior angle measures 72 degrees.
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A five-sided polygon is called a pentagon.
A regular polygon has equal lengths of each side, AND the same angle between each of the sides. A Square is a polygon, an equilateral triangle is a polygon, a pentagon is a five - sided polygon, and so on.
360 ÷ 72 = 5, so that the regular polygon is a pentagon (a five-sided polygon).
A pentagon is a 5 sided polygon.
Interior + Exterior = 180 and Interior = 5*Exterior So interior = 150 degrees and exterior = 30 degrees. Nothing more may be said unless it is known that the polygon is regular.