Standard - GEO.G.SRT.2:
Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar. Explain using similarity transformations that similar triangles have equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides.

Standard - GEO.G.SRT.3:
Use the properties of similarity transformations to establish the AA~, SSS~, and SAS~ criterion for two triangles to be similar.

Standard - GEO.G.SRT.4:
Prove and apply similarity theorems about triangles.

Standard - GEO.G.SRT.6:
Understand that by similarity, side ratios in right triangles are properties of the AII-F.TF.2 angles in the triangle, leading to definitions of sine, cosine and tangent ratios for acute angles.

Standard - GEO.G.SRT.7:
Explain and use the relationship between the sine and cosine of complementary angles.

Standard - GEO.G.SRT.8:
Use sine, cosine, tangent, the Pythagorean Theorem and properties of special right triangles to solve right triangles in applied problems. ★

Standard - GEO.G.SRT.9:
Justify and apply the formula A= 1/2ab sin (C) to find the area of any triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side.