1. Warm-Up! Find the Distance and Midpoint between the two points (-12, 6) and (-4, -3)

2. 4.2 Triangle Congruence by SSS and SAS 12/4

3. Learning Target I can prove two triangles congruent using the SAS and SSS postulates.

4. Vocabulary Side-Side-Side (SSS) Postulate: If three sides of one triangle are congruent to the three sides of another triangle, then the two triangles are congruent.

5. SSS Example ABC ≅ DEF

6. Vocabulary Side-Angle-Side (SAS) Postulate: If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the two triangles are congruent.

7. SAS Example CBA ≅ FED

8. Practice: 4-2 Worksheet

9. Practice 1-9 on the 4-2 worksheet.

10. Practice Proving Together 14 and 15 on the 4-2 Worksheet.

11. Recap Questions Do you know what SSS and SAS means? Can you identify two congruent triangles with the SSS and SAS Postulates? Can you provide Reasoning in a Proof?

12. Homework: P. 189-190 #1-21 all, skip 7 Due Monday