CCLS - Math: G.SRT.2

Similarity, Right Triangles, And Trigonometry
Understand Similarity In Terms Of Similarity Transformations
State Standard:
Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides.