To answer this question it has to be assumed that it is a regular polygon ie with equal angles.
Sum of the interior angles = (7-2)*180 = 5*180 = 900 degrees
So each interior angle = 900/7 = 128.57 degrees.
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the interior angle of a 7 sided regular polygon is 128.57 degrees
The interior angles of a 7 sided polygon add up to 900 degrees
The interior angles of a 7 sided polygon add up to 900 degrees
A heptagon is a 7 sided polygon whose interior angles add up to 900 degrees.
A shape with 7 sides and 7 angles is called a heptagon. A heptagon is a polygon with seven straight sides and seven interior angles. Each interior angle of a regular heptagon measures 128.57 degrees.