Understanding Triangle Angles: Exploring Properties and Solving Problems

This lesson covers the properties of triangle angles, emphasizing that they sum to 180 degrees. It introduces transversals and their role in creating special angle properties, such as alternate and corresponding angles. The lesson explains how triangles can be formed using transversals and parallel lines, and demonstrates how to solve for missing angles using these concepts.

What is the sum of the interior angles of a triangle?

Explain what a transversal is in relation to parallel lines.

What are alternate interior angles and what is their property?

How can you demonstrate that the angles of a triangle sum to 180 degrees using paper?

If two angles of a triangle measure 89 degrees and 68 degrees, what is the measure of the third angle?