1. WARM-UP Name the 5 ways to prove triangles are congruent.
What 2 methods can we NEVER use to prove triangles are congruent?
What always comes after a triangle congruency in a proof?

2. Answers to Homework 1) 115 2) 10 3) 7 4) 40 5) 36 6) 1)Given
1) 115 2) 10 3) 7 4) 40
5) 36
6) 1)Given
2) Def. of Rt Triangle
3) Given
4) Reflexive
5) HL (90)
7)1) Given
2) Isc. Tri. Thm.
3) Supps of congruent angles are congruent
4) AAS
5) CPCTC

3. 4-6 Using More than One Pair of Congruent Triangles
∆VWS
∆TUV
∆TVW

4. Given: Prove:
1) 2) 3) 4) 5) 6) 7)
Given
Reflexive
ASA
CPCTC
SAS

5. Key Points from the Proof
ASA
CPCTC
SAS
Don’t use Reflexive, or any other obvious theorem
Just need congruent triangles and CPCTC

6. Example: Prove AB = CD
Key Points
ASA
CPCTC
SAS X O D C A B Y

7. TOO Page 148 #3&4
3) SSS CPCTC SAS
4) AAS CPCTC HL

8. Homework Page 148 #1-9 Written Exercises #7 is 7 steps #8 is 9 steps