Question

Polygon with three interior angles whose sum 180 degrees

Answer 1

60

Explanation:

I'm assuming you want to know the angle measures. Just divide 180 by 3 and you get 60.

Answer 2

Triangle

Explanation:

A triangle has three vertexes, and therefore three interior angles. Those angles also sum to 180 degrees because of the formula (n-2)*180, where n is the number of sides that a polygon has. Plugging in 3, you get
`1\cdot 180`, or just 180 degrees. Hope this helps!