540
The polygon with 5 side is called a pentagon.
Pentagon can be divided into one triangle and a quadrilateral or three triangles.
Both of these equal to 540 because the sum of the interior angle of a triangle is 180 and 360 for a quadrilateral.
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A 10 sided decagon polygon has 10 interior angles that add up to 1440 degrees.
Exterior angles add up to 360 degrees Interior angles add up to 4140 degrees
Exterior angles add up to 360 degrees Interior angles add up to 3600 degrees
A 13 sided polygon interior angles add up to 1980 degrees.
The interior angles of a 17 sided polygon add up to 2700 degrees