Since a three sided polygon is another name for a triangle.
We would use the formula of
* (n - 2)180 = degrees of the polygon
* n = number of sides of the polygon
* (3(sides) - 2)180 * (1)180) * = 180o
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The interior angles of a 7 sided polygon add up to 900 degrees
The degrees in a 19 sided polygon add up to 3,060 degrees
An 8 sided polygon is an octagon and has exterior angles that add up to 360 degrees and its interior angles add up to 1080 degrees
The interior angles of a 7 sided polygon add up to 900 degrees
The interior angles of an 11 sided polygon add up to 1620 degrees