2. 40  x 4x – 20  Solve. Warm up 1. 2y + 28  3y – 14° 2. 42 

3. Questions over HW? Did you have hw?

4. Congruent Triangles

5. Congruent triangles have 3 congruent sides and 3 congruent angles. The parts of congruent triangles that “match” are called corresponding parts.

6. In a congruence statement ORDER MATTERS!!!! Everything matches up.

7. Corresponding Parts of Congruent Triangles are Congruent

8. Complete each congruence statement. C A E D B F If  ABC   DEF, then BC  ___ EF

9. Complete each congruence statement. C A E D B F If  ABC   DEF, then  A  ___ DD

10. Complete each congruence statement. C A E D B F If  ABC   DEF, then  C  ___ FF

11. Fill in the blanks If  CAT   DOG, then AC  ___ OD

12. Fill in the blanks  BAT   MON  T  ___ _____   ONM _____  MO NM  ____ NN  ATB BA TB

13. Fill in the blanks  BCA   ____  ____   GFE EGF CAB

14. Complete the congruence statement.  _____   JKN MKL

15. Complete the congruence statement.  _____   CBD ABD

16. 5 ways to Prove Triangles Congruent

17. Side-Side-Side (SSS) Congruence Postulate All Three sides in one triangle are congruent to all three sides in the other triangle

18. Side-Angle-Side (SAS) Congruence Postulate Two sides and the INCLUDED angle (the angle is in between the 2 marked sides)

19. Angle-Angle-Side (AAS) Congruence Postulate Two Angles and One Side that is NOT included

20. Angle-Side-Angle (ASA) Congruence Postulate Two angles and the INCLUDED side (the side is in between the 2 marked angles)

21. There is one more way to prove triangles congruent, but it’s only for RIGHT TRIANGLES…Hypotenuse Leg

22. Your Only Ways To Prove Triangles Are Congruent NO BAD WORDS

23. 3 markings YOU can add if they aren’t marked already

24. Share a side Reason: Reflexive Property Vertical Angles Reason: Vertical Angles are congruent

25. Alternate Interior Angles Reason: Alt. Int angles are congruent

27. Homework WS #1 – 12