1. 4-3: Congruent Triangles
Objective: Identify congruent triangles, and name & label corresponding parts of congruent triangles.

2. Congruent Figures have the same shape and the same size.

3. Ex. 1 Congruence Statement: Corresponding Sides Corresponding Angles
Other Congruence Statements:

4. Corresponding parts of congruent triangles are congruent. “C.P.C.T.C.”

5. Ex. 2:

6. Properties of Congruence
Reflexive Property:
Symmetric Property:
Transitive Property:

7. DOUBLE ANGLE THEOREM D. A. T
DOUBLE ANGLE THEOREM D.A.T.: If two angles of one triangle are congruent to the corresponding angles of another triangle then the third angles are congruent
Third Angles Theorem – If two angles of one triangle are congruent to 2 angles of a 2nd triangle, then the 3rd angles are congruent

8. Ex. 3: Determine if the triangles are congruent.

9. Statements
Reasons