1. Triangle Congruence
4.2 /4.3 Day 1
SSS, SAS, ASA, AAS

2. Objectives
Know the 4 triangle congruence thms

3. Discovering Congruent Triangles Activity
Yesterday we learned what it means to be a congruent figure. Today, you will discover theorems to prove triangles congruent.
Working independently or with a partner, go to the link and work through the six parts to discover the theorems
Everyone must complete their own packet!
You will have 25 min to complete the packet (that allows ≈4 min for each part)

4. Triangle Congruence Activity Chat
What were the four theorems that prove triangles congruence?
What two DID NOT work? Why?
Why are SSS, SAS, ASA, and AAS helpful to know?

5. Let’s Look Again…
Back to the warm up… Can we say these triangles are congruent? Why?

6. ∠ M
LN and LM
∠ L
LN and NM
∠ N LN

7. sides

8. Angle-Angle-Side (AAS)

9. ASA
Not enough info
Not enough info

10. SSS
SAS
SSS
ASA

11. Objectives
Know the 4 triangle congruence thms

12. Exit Slip…. On the back of your warm up
Pick one of the pictures below and prove that the triangles are congruent.
What theorem are you using? (SSS, SAS, ASA, AAS)
What are the congruent corresponding angles/sides you are using? Why are they congruent?

13. Kuta Software SSS, SAS, ASA, AAS Congruence WS #1-10
Homework
4.2/4.3 Practice #1-10
Kuta Software SSS, SAS, ASA, AAS Congruence WS #1-10
If you finish in class, check HW off with Ms. Bohler