What do the angles of a triangle add up to?
A triangle is a closed figure or shape with 3 sides, 3 angles and 3 vertices.
Answer: The angles of a triangle add up to 180 degrees.
An interior angle is an angle measured between the two sides of a polygon.
Using the general formula for the sum of the angles of any polygon
S = (n - 2) × 180.
For triangle, n = 3
Therefore, S = (3 - 2) × 180 = 180