(number of sides-2)*180 = total sum of interior angles
8
7
6
3240
There is no regular polygon with an interior angle of 20o. If the interior angle is 120o then there are six sides and the sum of the angles is 720o.
1440 degrees
1440 degrees
1800 degrees
8
6
7
It depends on what type of polygon it is and how many angles it has.
15
3240
3240
There is no regular polygon with an interior angle of 20o. If the interior angle is 120o then there are six sides and the sum of the angles is 720o.
The method of finding the sum of the interior angles of a polygon is by multiplying the (number of sides)-2 by 180, so the sum of the interior angle measures in a 25-sided polygon would be 23*180, or 4140 degrees.