360 degrees
180
1260 degrees
360 degrees
A parallelogram has four sides. All four sided figures have a sum of the interior angle measures equal to 360°.
360 degrees
1,080
Sum= 2340 Degrees A+
180
1260 degrees
2340
1260 degrees
360 degrees.
1260 degrees
360 degrees
180
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.