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Geometry November 10, 2016 Chapter 4-1: SSS and SAS Theorems DO NOW Give an example of when you might estimate something. Solve by estimating (do NOT give the exact value): 1. 499 x 39 = 3. 399 / 38 = 2. 189 + 12 = 4. 473 x 22 = Agenda • Announcements (2nd hour only) • Do Now • Review • Practice • Notes I can name congruent objects, and determine if triangles are congruent. Objective/Big Question How do we prove triangles are congruent? Review: Side-Side-Side Congruence Two triangles are congruent if and only if all their corresponding sides are congruent. Review: Side-Angle-Side Congruence Two triangles are congruent if and only if two sides and the included angle are congruent. Practice Angle-Angle-Side and Angle-Side-Angle Two triangles are congruent if and only if two angles and one side are congruent. Angle-Angle-Side and Angle-Side-Angle Two triangles are congruent if and only if two angles and one side are congruent. Summary SSS: Three pairs of congruent sides SAS: Two pairs of congruent sides and the included angle ASA: Two congruent angles and the included side AAS: Two congruent angles and a non-included side
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