Table of Contents

8.G.5 Understand congruence and similarity using physical models, transparencies, or geometry software: Use informal arguments

Understand congruence and similarity using physical models, transparencies, or geometry software: 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.


Student Resources

by Allen Wolmer

Angle Relationships

Curriki RatingNR

Teacher Resources

by Allen Wolmer

Angle Relationships

Curriki RatingNR

Do NOT follow this link or you will be banned from the site!

Non-profit Tax ID # 203478467