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4-2 Triangle Congruence by SSS and SAS Notes • SSS- side, side, side. • SAS- side, angle, side (MUST BE IN ORDER!!) • We will use these new theorems to prove triangles are congruent without needing to show all sides, and all angles are congruent. Theorem Example 1 Plan: To prove the triangles are congruent by SSS, the three pairs of sides need to be congruent Theorem What does that mean!?! Example 2 Example 3 • Discuss with someone what you think you need to do to solve this Example 4 Practice! • Pg 189-190 #1-5, 7-11, 14-21, 22-27