The formula for the sum of the angles of an interior polygon is 180(n-2), where n is the number of sides, so then you solve 180(n-2) = 1980.
(n-2) = 11
n = 13.
So the polygon has 13 sides.
The interior angles add up to 1800 degrees
A 13 sided polygon interior angles add up to 1980 degrees
4140
A 4 sided quadrilateral has interior angles that add up to 360 degrees and its exterior angles add up to 360 degrees
540 degrees
The interior angles of a 17 sided polygon add up to 2700 degrees
If it's a regular polygon then each interior angle measures 120 degrees.
There are 5 interior angles and each one measures 108 degrees (180-72). Since the sum of exterior angles of any polygon is 360⁰, then that polygon would have 5 angles (360/72). So the sum of interior angle measures is 540⁰.
If each angle measures 90 degrees the polygon is a square and so its angles sum to 360 degrees.
3600 Degrees
The interior angles add up to 1800 degrees
The interior angles add up to 3240 degrees
The interior angles add up to 2340 degrees
A 13 sided polygon interior angles add up to 1980 degrees
It is a regular 20 sided polygon
The 13 interior angles of a 13 sided polygon add up to 1,980 degrees
The 3 interior angles of this equilateral triangle will add up to 180 degrees