1. Triangle Congruence by SSS and SAS
Learning Target: I can prove two triangles congruent using the SSS and SAS Postulate.

2. Side-Side-Side Postulate (SSS Postulate)
If three sides of one triangle are congruent to the three sides of another triangle, then the two triangles are congruent. Q H P G R F
What can we conclude about the triangles using SSS Postulate?
Triangle GHF is congruent to Triangle PQR

3. Decide with your partner which can be proven with SSS.
If not, what information is missing?
1. Pink can be proven with SSS
2. Green can be proven with SSS
3. Yellow can be proven with SSS
4. Blue cannot be proven with SSS because we need the other pair of sides.

4. Given: AB≅CB, AD≅CD B Prove: ABD≅ CBD A C D Statements Reasons
AB≅CB Given
AD≅CD Given
BD≅BD Reflexive Property
Triangle ABD is SSS Postulate
congruent to
Triangle CBD A C D

5. Side-Angle-Side Postulate (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.
***In this case, included means between the two sides*** B F C A D E
What can we conclude about the triangles using SAS Postulate?
Triangle BCA is congruent to Triangle FDE

6. Decide with your partner which can be proven with SAS.
If not, what information is missing?
1. Pink cannot be proven with SAS because the angle is not in between the two sides.
2. Green can be proven.
3. Yellow can be proven.
4. Blue can be proven.

7. Given: AB≅BD, EB≅BC Prove: ABE≅ DBC A B C E D Statements Reasons
AB≅BD Given
EB≅BC Given
<ABE≅<DBC Vertical angles are congruent
Triangle ABE is SAS Postulate
congruent to
Triangle DBC D