Angle Relationships Solve using same side interior angles with parallel lines ex 3

The video tutorial explains how to determine angle relationships in a parallelogram by focusing on one set of parallel lines and a transversal. It identifies whether angles are interior or exterior and explains the concept of same side interior angles, which are supplementary. The tutorial concludes by solving for a variable using these angle properties.

What is the relationship between same side interior angles?

How do you solve for the variable in the equation involving same side interior angles?