Understanding and applying that the corresponding angles of similar triangles are equal and their corresponding sides are proportional. Applying the AA criterion for two triangles to be similar. Finding unknown sides and angles of similar triangles in the real-world.
Mapped to CCSS Section# HSG.SRT.A.2, HSG.SRT.A.3
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. Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.