How to determine all the missing angles of two triangles ex 3

The video tutorial demonstrates how to find missing angles in triangles using the triangle angle sum theorem, which states that the sum of angles in a triangle is 180 degrees. The instructor calculates missing angles by applying this theorem and discusses angle relationships such as vertical angles and linear pairs. The tutorial concludes with solving for the final missing angle, reinforcing the concepts of angle relationships and the triangle angle sum theorem.

What relationships can be used when dealing with intersecting lines?

Explain how to determine the measure of angle four.