Shadows

Students will discover that the quotient of two side lengths in one triangle is equal to the quotient of the corresponding side lengths in a similar triangle. While this fact is not limited to triangles, this lesson focuses on the particular case of triangles so that students are ready to investigate the concept of slope in upcoming lessons.

By Desmos Classroom

Learning goals: Learning Goals • Understand that for similar triangles, the quotient of two side lengths in one triangle is equal to the quotient of the corresponding side lengths in the other triangle. • Determine missing side lengths in pairs of similar triangles using quotient relationships between side lengths.