1. Then/Now You identified and used congruent angles. Name and use corresponding parts of congruent polygons. Prove triangles congruent using the definition of congruence.

2. Vocabulary congruent congruent polygons corresponding parts CPCTC

3. Concept 1

4. CPCTC Corresponding Parts of Congruent Triangles are Congruent

5. Example 1 Identify Corresponding Congruent Parts Show that the polygons are congruent by identifying all of the congruent corresponding parts. Then write a congruence statement. Answer: All corresponding parts of the two polygons are congruent. Therefore, ABCDE  RTPSQ. Sides: Angles:

6. Concept 2

7. Concept 3

8. Show that polygons are congruent by identifying all congruent corresponding parts. Then write a congruence statement.

10. Statements Reasons