(Motivate) If the corresponding sides of two triangles are proportional, their corresponding angles are equal and the two triangles are similar.ĥ.

(Motivate) If in two triangles, the corresponding angles are equal, their corresponding sides are proportional and the triangles are similar.Ĥ. (Motivate) If a line divides two sides of a triangle in the same ratio, the line is parallel to the third side.ģ. (Prove) If a line is drawn parallel to one side of a triangle to intersect the other two sides in distinct points, the other two sides are divided in the same ratio.Ģ. Section formula (internal division)ĭefinitions, examples, counter examples of similar triangles.ġ. Review: Concepts of coordinate geometry, graphs of linear equations.