1. Intro to G.6
Congruent Triangles

2. Congruent Figures
IF two figures are congruent THEN they have the same size and shape.
IF two figures have the same size and shape THEN they are congruent.

3. Congruent Triangles - CPCTC
Corresponding Parts of Congruent Triangles are Congruent B C A Q R P =
A ↔ P; B ↔ Q; C ↔ R │ ≡
Corresponding sides and angles of the two congruent triangles: │ = ≡

4. Congruent Triangles = = ≡ ≡ │  A  ____  Z  Y  B  _____ │  X
Note:
∆ ZYX
∆ABC  ______
∆ABC  ∆XYZ
Lesson 4-2: Congruent Triangles

5. Example ……… If these polygons are congruent, how do you name them ? P
Pentagon MONTA  Pentagon PERSU
Pentagon ATNOM  Pentagon USREP
Etc.

6. Theorem 4.3: Third Angles Theorem
Lesson 4-2: Congruent Triangles