1. 4.2-Congruence & Triangles

2. Congruent figures
Have the same size
And shape.

3. Non Congruent figures
Have different shape
And size

4. Corresponding parts of congruent triangles are congruent.

5. The corresponding sides are also congruent….

9. Theorem 4.3-Third Angle Theorem
If two angles of one triangle are congruent to two angles of another triangle,
Then the third angles are also congruent.

10. Are these two triangles congruent?

12. Theorem 4.4 Properties of Triangle congruence
Triangle congruence is
Reflexive
Symmetric
Transitive

13. Review Problem
What is the distance between the points C(3,-8) and D(-13,7)?
What is the coordinate of the midpoint of segment CD?

14. Assignment 4.2