1. Lesson 6.4 Prove Triangles Similar by AA

2. Objective Use the AA similarity postulate

3. Standard 5.0 – Students prove that triangles are congruent or similar, and they are able to use the concept of corresponding parts of congruent triangles 12.0 – Students find and use measures of sides and of interior and exterior angles of triangles and polygons to classify figures and solve problems

4. Academic Language Similar polygons

5. Think/Pair/Share What are necessary details to prove 2 triangles are similar?

7. Practice

8. More practice

9. Practice

10. Indirect Measurement

11. Try it again!

12. Homework p.384 #1, 2, 5, 9, 13, 21, 31, 32