Unit 4: Congruent Triangles

We start this unit by reviewing what it means for two figures to be "congruent." We then take this idea and define what we need to know in order to prove that two triangles are congruent.

Unit 4 Quizlet

Khan Academy Videos

Click on the links below for videos for extra help! Mrs. Gray's Geometry Videos are also available.

4.1- Congruent Figures (first 7 minutes of video)

4.2-Triangle Congruence by SSS (last 4 minutes of video) and SAS

***Why Side-Side-Angle doesn't work

4.3-Triangle Congruence by ASA and AAS

4.4- Using Corresponding Parts of Congruent Triangles

4.5- Isosceles and Equilateral Triangles

4.6- Congruence in Right Triangles

4.7- Congruence in Overlapping Triangles

Important Unit Documents