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October 22, 2014 Questions 4.3 4.4 Prove Triangles Congruent by SAS and HL included angle Ex 1) Use the diagram to name the included angle between the given pair of sides. A a) BC and CD D b) BA and DA B c) AB and BC C October 22, 2014 Postulate 20- Side-Angle-Side (SAS) Congruence Postulate If two sides and the included angle of one triangle are congruent to two sides and the included angles of a second triangle, then the two triangles are congruent. V If Side RS ≅ UV S Angle R≅ U Side RT ≅ UW then RST ≅ U UVW R T Ex 2) Decide whether enough information is given to prove that the triangles are congruent using the SAS Congruence Postulate. a) ABD, CDB R S Q b) V T U EFH, GHF F E G c) H KLM, MNK K N L M W October 22, 2014 Right Triangles- hypotenuse leg leg Theorem 4.5- Hypotenuse-Leg (HL) Congruence Theorem If the hypotenuse and a leg of a right triangle are congruent to the hypotenuse and a leg of a second triangle right triangle, then the two triangles are congruent. Ex 3) Find two triangles that are congruent using HL Congruence Theorem. B A C D H G F E October 22, 2014 Assignment P.243 #4-8 even, 9-15 all, 20-22 all, 26, 38, 44, 48 Quiz 4.1-4.4 Friday