Geometric Properties

Unit Handouts

Additional Resources

Transversal Lines Overview

Transversal Line Video

Angle Sum Theorem Overview

Angle Sum Theorem Practice

Angle-Angle Similarity Postulate Video
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Angle-Angle Similarity Postulate Practice

Exterior Angle Theorem Overview

Exterior Angle Theorem Practice

Parent Guide

Standards:

​8.G.5 - Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles. For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals why this is so.

Videos