High School · Similarity, Right Triangles, and Trigonometry

CCSS.MATH.CONTENT.HSG.SRT.A.3

Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.

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.