If each angle measures 90 degrees the polygon is a square and so its angles sum to 360 degrees.
2340
77. The sum of the three angles in a triangle equal the sum of 180 degrees
18,000 degrees
15
360 degrees
180
The sum of the interior angles of a 29-gon add up to 4860 degrees.
720
360
35
360
180
The sum of the measures of the angles in a figure having 9 sides is 20 degrees each angle.
Sum= 2340 Degrees A+
1,080
supplementary