1. (4.2) Triangle Congruence by SSS and SAS
Objective: To prove two triangles congruent using the SSS and the SAS Postulates.

2. Congruent Triangles
Postulate 4-1: Side-Side-Side (SSS) Postulate: If the three sides of one triangle are congruent to the three sides of another triangle, then the two triangles are congruent.

3. Proving Triangles CongruentF H J K
Statements
Reasons 1. 2. 3. 4.

4. Proving Triangles CongruentB D A C
Statements
Reasons 1. 2. 3.

5. Congruent Triangles
Postulate 4-2: Side-Angle-Side (SAS) Postulate: If two sides and an included angle of one triangle are congruent to two sides and an included angle of another triangle, then the two triangles are congruent.

6. Proving Triangles Congruent
Can you use the following information to prove the triangles congruent? A E B C D
Not enough information to prove triangles congruent!!

7. Proving Triangles Congruent
Can you use the following information to prove the triangles congruent? A E B C D
Statements
Reasons 1. 2. 3.

8. 4.2 Triangle Congruence by SSS and SAS
Homework: 1. (4.2) Pgs ; 3, 6-13 all, all, all, all Due: Mon. 2. Unit 3 Portfolio Due: Mon.
3. MM T3 S2 Due: Mon.
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