1. Warm-Up

2. Day 13 - Triangle Congruence Postulates
SWBAT to prove triangles are congruent using SSS, SAS, ASA, AAS and HL

3. Mini-Assessment #3
Date: Thursday 10/31 (Periods 2, 4) or Friday 11/01 (Periods 1, 3)
Covers:
Day 10A – Pythagorean Theorem
Day 10B – Similar Right Triangles / Geometric Mean
Day 11 – Parallel Lines & Transversals (Corresponding Angles, Alternate Interior Angles, Alternate Exterior Angles, Same Side Interior Angles, etc)
Day 12 – Isosceles Triangle, Exterior Angle, Triangle Sum

4. Polygon Exterior Angle-Sum Theorem
The of the measures of the exterior angles of a polygon, one at each vertex, is 360.
sum

5. Find the measures of the exterior angles.

6. Informal Geometry
12/7/2018
Congruent Triangles
Congruent triangles have 3 congruent sides and 3 congruent angles.
The parts of congruent triangles that “match” are called corresponding parts.

7. ORDER MATTERS!!!! In a congruence statement Everything matches up.
Informal Geometry
12/7/2018
Congruence Statement
In a congruence statement
ORDER MATTERS!!!!
Everything matches up.

8. Corresponding Parts of Congruent Triangles are Congruent
CPCTC
Corresponding Parts of Congruent Triangles are Congruent

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

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

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

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

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

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

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

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

17. There are 5 ways to prove triangles congruent.

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

19. Side-Angle-Side (SAS) Congruence Postulate
Two sides and the INCLUDED angle of one triangle are congruent to two sides and the included angle of a second triangle.

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

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

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

23. Your Only Ways To Prove Triangles Are Congruent
SSS
SAS
ASA
AAS HL
NO BAD WORDS
Your Only Ways To Prove Triangles Are Congruent

24. 2 markings you can add if they aren’t marked already

25. Reason: reflexive property
Share a side
Reason: reflexive property
Vertical Angles
Reason: Vertical Angles are congruent

26. CW:
Practice Worksheet
#1 – 9

27. Homework WS #1 – 12