Finding Missing Angle Measures Using Simple Equations and the Triangle Sum Theorem

The video tutorial explains how to find missing angle measures in triangles using simple equations and the triangle sum theorem. It demonstrates solving for unknown angles Y and X by setting up equations based on the theorem that the sum of angles in a triangle is 180°. The tutorial includes steps for combining like terms, isolating variables, and verifying results by substituting back into the original expressions. The process is repeated for two different triangles, ensuring understanding of the method.

Explain how to check if the angles found in a triangle add up to 180°.

What is the value of X when using the triangle sum theorem for the second triangle?

What are the final angle measures found in the second triangle?