4.2: Triangle Congruence by SSS and SAS If you ain’t first, you’re last! -Ricky Bobby If you ain’t first, you’re last!

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4-2 Triangle Congruence by SSS and SAS

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Presentation transcript:

4.2: Triangle Congruence by SSS and SAS If you ain’t first, you’re last! -Ricky Bobby If you ain’t first, you’re last!

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.

Proving Triangles Congruent G F H J K StatementsReasons

Proving Triangles Congruent B D AC StatementsReasons

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.

Congruent Triangles SSS, SAS, or NEI?

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

Proving Triangles Congruent E A B D C StatementsReasons Can you use the following information to prove the triangles congruent?

4.2 Triangle Congruence by SSS and SAS I was never a very good practical joker. -Bill Murray Homework 4.2: 3, 6-9, 16-18, 20-25, I was never a very good practical joker.