Chapter 4 Review (Proving Triangles are congruent) 4-1 Congruent Triangles In this section, we found out what congruent triangles are. Congruent triangles are triangles with congruent corresponding sides and angles. There isnâ€™t a lot of information to recall from this chapter but it is just very important to understand what congruent triangles are. 4-2 Proving triangles are congruent by S.S.S and S.A.S In this section, we were taught how to prove triangles are congruent by S.S.S and S.A.S Page 232 # 28, 29, 30, 33 35, 36 4-3 Proving triangles are congruent by A.S.A and A.A.S In this section, we were taught how to prove triangles are congruent by A.S.A and A.A.S Page 238 # 12, 13, 17, 25, 32 REMEMBER!!! You cannot prove triangles are congruent by A.S.S and A.A.A 4-4 Corresponding parts of congruent triangles are congruent (C.P.C.T.C) In this section, we learned about corresponding parts of congruent triangles. If you prove that two triangles are congruent, then its corresponding sides and angles are congruent. Example: If triangles DEF and GHI are congruent, then DE = GH or <EFD = <HIG. Page 246 6, 11, 15, 19, 4-5 Isosceles and Equilateral Triangles In this section, we learned about specific properties of Isosceles and Equilateral triangles. Remember, Isosceles triangles have two congruent sides and their base angles are congruent. An equilateral triangle have all congruent sides and angles. The angles of an equilateral triangle must be 60 degrees. Page 253 # 3, 7, 10, 11, 12, 40 4-6 Hypotenuse-Leg Theorem In this section, we learned how we can prove right triangles are congruent using the hypotenuse leg theorem. Page 262 # 11, 18, 24 4-7 Congruence of Overlapping Triangles In this section, we did not learn any theorem or vocab but we learned about overlapping triangles and how to highlight specific triangles and separate the two of them. The purpose of separating the two triangles is to see them more clearly. Especially when you start to prove the triangles are congruent, it really helps you visualize your congruent marks on sides and angles. Page 268 # 8, 12, 17, 25, 26

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# Chapter 4 Review Geometry