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## Side – Side – Side (SSS) Postulate

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**4-2 Triangle congruence by SSS and sasM.11.C.1**2.5.11.BObjectives:1)to prove two triangles congruent using the SSS and SAS Postulates**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.**Side- Angle- Side (SAS) Postulate**• If two sides and the included angle of one triangle are congruent to the two sides and the included angle of another triangle, then the two triangles are congruent.**Examples**___ ___ ___ • Given M is the midpoint of XY, AX ≅ AY • Can we prove △AMX ≅ △AMY? Explain.**Examples**___ ___ • AD ≅ BC • Prove △ADC ≅ △BCD two different ways.**Examples**• ∠RSG ≅ ∠RSH • SG = SH • Can the given info prove △RSG ≅△RSH? ___ ___**Example**• Can you prove the two triangles are congruent? • Triangle MNP and Triangle QRS with MN = QR, <N = <R and NP = RS.**CLASS WORK**• Handed – In • Page 189 #1-5, 8-29