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These postulates sss, sas, asa, aas, and hl provide powerful tools for proving triangle congruence. Congruent triangles are triangles in which their corresponding sides and their corresponding angles are equal. There are five ways to find if two triangles are congruent sss, sas, asa, aas and hl. A sss triangle is a triangular combination with three known sides and three unknown angles.

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