Learn how to use interior angle sum theorem for triangles to determine the missing angle

The video tutorial explains how to find the missing angle in a triangle. It begins by stating that the sum of all angles in a triangle is 180 degrees. The instructor sets up an equation using the known angles and solves it to find the missing angle, which is 68 degrees. The process involves writing the equation, combining known angles, and solving for the unknown angle.

What is the value of angle 1 after solving the equation?

Explain the process of finding a missing angle in a triangle.