it's a heptagon
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The interior angles of a 7 sided polygon add up to 900 degrees
If the sum of the interior angles = 900 degrees, then it is a Heptagon and has seven sides. =] -ray
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.
The 7 interior angles add up to 900 degrees
The interior angles of a 7 sided polygon add up to 900 degrees