WARM-UP

1
WARM-UP

1. Name the 5 ways to prove triangles are congruent.
2. What 2 methods can we NEVER use to prove
   triangles are congruent?
3. 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
• 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)

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

5
Key Points from the Proof

• ASA
• CPCTC
• SAS
• CPCTC

• Dont use Reflexive, or any other obvious theorem
• Just need congruent triangles and CPCTC

6
Example Prove AB CD

• Key Points
• ASA
• CPCTC
• SAS
• CPCTC

X
O
C
D
A
B
Y
7
TOO Page 148 34

• 3)
• SSS
• CPCTC
• SAS
• CPCTC

• 4)
• AAS
• CPCTC
• HL
• CPCTC

8
Homework

• Page 148 1-9 Written Exercises
• 7 is 7 steps
• 8 is 9 steps
• 9 is 6 steps