Look for and express regularity in repeated reasoning.
Discovering Similar Triangles with the Pattern a, a√3, 2a
20 minutes
Proving that These Triangles are 30, 60, 90 Triangles
15 minutes
Applying the Pattern
10 minutes
I ask that the students turn to the back of the Rectangle Diagrams handout. These problems and the accompanying questions help to pull together and summarize the topic of the 30-60-90 Right Triangle.