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1Geometry Lesson: S.S.S. Postulate 2) ) ) ) 1) ) How do we prove triangles congruent using Side-Side-Side Postulate? In each example, state a plan for proving the triangles are congruent. 1. Reflexive Post. X 2. A.S.A. 3. S.A.S. 2. S.A.S. 4) 1. S.S.S. ) ) 3) 1. Supplements of congruent angles.( ( 2. Reflexive Post. X

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2 Postulate: Postulate: Side-Side-Side Postulate (S.S.S.) If the three sides of one triangle are congruent to the three sides of another triangle, then the two triangles are congruent. Ex: Which sides must first be proved congruent in order to prove the triangles congruent using the S.S.S. Postulate? 1) A B C D 2) A B C D E F 3) A B C D X

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3Geometry Lesson: S.S.S. Postulate Ex 1: Proof w/S.S.S. StatementReason 1) 2) 3) 4) 5) 6) Given Def. line bisector Def. midpoint Reflexive Postulate S.S.S. Postulate R TP X Given: Prove:

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4Geometry Lesson: S.S.S. Postulate Ex 2,3,4: Proofs w/S.S.S. 2) Given: Prove: N Q P R E P N X L Q 3) Given: Prove: P A V C R T 4) Given: Prove:

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5Geometry Lesson: S.S.S. Postulate Ex 5,6: Proofs w/S.S.S. A F CD BE 5) Given: Prove: KP H L 6) Given: Prove: R N P E GH

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