Common Core Teaching Resources

CCSS.MATH.CONTENT.8.G.A.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.

Trending CCSS.MATH.CONTENT.8.G.A.5 teaching resources

The latest CCSS.MATH.CONTENT.8.G.A.5 teaching resources

You might also like Understand congruence and similarity using physical models, transparencies, or geometry software teaching resources