High School · Similarity, Right Triangles, and Trigonometry

CCSS.MATH.CONTENT.HSG.SRT.B.5

Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

Read this standard on the official Common Core site

Lessons that teach this standard

• Similar Triangles and the AA Criterion

  Why two equal angles are enough to prove triangles similar, how corresponding sides stay in a fixed ratio, and how to use that ratio to measure things you cannot reach.