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4 Triangles and Congruence
Chapter Outline
4.1 Triangle Sum Theorem
4.2 EXTERIORANGLESTHEOREMS
4.3 CONGRUENTTRIANGLES
4.4 CONGRUENCESTATEMENTS
4.5 THIRDANGLETHEOREM
4.6 SSS TRIANGLECONGRUENCE
4.7 SAS TRIANGLECONGRUENCE
4.8 ASAANDAAS TRIANGLECONGRUENCE
4.9 HL TRIANGLECONGRUENCE
4.10 ISOSCELESTRIANGLES
4.11 EQUILATERALTRIANGLES
Introduction
In this chapter, you will learn all about triangles. First, we will learn about the properties of triangles and the angles
within a triangle. Second, we will use that information to determine if two different triangles are congruent. After
proving two triangles are congruent, we will use that information to prove other parts of the triangles are congruent
as well as the properties of equilateral and isosceles triangles.