1. Warm Up

2. Lesson 25: SSS Triangle Congruence Geometry

3. Vocabulary  Corresponding sides and corresponding angles of polygons are those that are in the same position in two different polygons with the same number of sides.  Corresponding parts are indicated by the names of the polygons.  We name polygons in the order that their parts correspond.  Congruent triangles : triangles where all their corresponding sides and angles are congruent’  Triangle rigidity: a triangle can have only one size and shape

4. SSS and CPCTC  Postulate 13: Side-Side-Side Congruence Postulate : If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent  CPCTC : an abbreviation for the phrase “Corresponding Parts of Congruent Triangles are Congruent”

5. Example X Y Z L M K

6. Write a congruence statement for the two triangles below. K L M RP Q

7. Example Identify the congruent sides and angles of the two triangles below and write six congruence statements. C A BZ X Y

8. Example A DB C

9. Homework Questions

10. Correcting Homework  Get your homework out so I can stamp it.  If you do not have your homework complete, write your name on the board.  Use red pen/pencil to correct.  Trade with someone who has the homework done.  If you didn’t get it done, you need to be working on finishing it now. Remember no cheating and no work = no credit.  Make sure you write CB with your name or you will lose your citizenship points for today.

11. Homework Lesson 25: a-d, 1, 2, 3, 4, 5, 7, 11, 14, 15, 21, 26