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.

Explanation:

Using the general formula for the sum of the angles of any polygon

S = (n - 2) × 180.

For a triangle, n = 3

Therefore, S = (3 - 2) × 180 = 180

Thus, the angles of a triangle add up to 180 degrees.