The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees.
1440 degrees
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1440
The exterior angles of any polygon add up to 360 degrees including a 10 sided regular decagon of which each exterior angle will measure 360/10 = 36 degrees.
Any angle that you like. There are no constraints on a single angle of a decagon, only on their sum.
Interior angles add up to 1440 degrees Each interior angle of a regular decagon measures 144 degrees
Marcus is correct. The sum of the exterior angles of any polygon is always 360 degrees. A decagon has 10 sides, so each exterior angle measures 36 degrees (360 degrees divided by 10). A heptagon has 7 sides, so each exterior angle measures 51.43 degrees (360 degrees divided by 7). Therefore, the sum of the exterior angles of a decagon is indeed greater than that of a heptagon.