# Triangles ## Select Student Learning Expectation (SLE)

T.2.G.1 | T.2.G.1 (En Español) Apply congruence and similarity correspondences and properties of figures to find missing parts of geometric figures and provide logical justification.

T.2.G.2 | T.2.G.2 (En Español) Investigate the measures of segments to determine the existence of triangles.

T.2.G.3 | T.2.G.3 (En Español) Identify and use the special segments of triangles (altitude, median, angle bisector, perpendicular bisector, and midsegment) to solve problems.

T.2.G.4 | T.2.G.4 (En Español) Apply the Pythagorean Theorem and its converse in solving practical problems.

T.2.G.5 | T.2.G.5 (En Español) Use the special right triangle relationships (30˚-60˚-90˚ and 45˚-45˚-90˚) to solve problems.

T.2.G.6 | T.2.G.6 (En Español) Use trigonometric ratios (sine, cosine, tangent) to determine lengths of sides and measures of angles in right triangles including angles of elevation and angles of depression.

T.2.G.7 Use similarity of right triangles to express the sine, cosine, and tangent of an angle in a right triangle as a ratio of given
lengths of sides.