1. Bellwork Write if-then form, converse, inverse, and contrapositive of given statement. 3x - 8 = 22 because x = 10

2. Lesson 5.6 Inequalities in two triangles and Indirect Proof

3. Objective Use inequalities to make comparisons in two triangles

4. Standard 2.0 – Students write geometric proofs, including proofs by contradiction

5. Academic Language Indirect Proof Included Angle

6. Hinge Theorem

8. Example

9. The Real World

10. Practice

11. Indirect Proof Make a temporary assumption that the desired conclusion is false. By proving this assumption is impossible, you prove the original statement true by contradiction.

12. Example

14. Use Indirect Proof

15. Practice – Indirect Proof

16. Homework p.338 #1, 2, 3, 5, 7, 11, 13, 17