Warm up. Solve. 1. 40. 4x – 20 . x. 2. 42. 2y + 28 . 3y – 14°. Questions over HW? Did you have hw?. Congruent Triangles. Congruent triangles have 3 congruent sides and 3 congruent angles. The parts of congruent triangles that “ match ” are called corresponding parts. - PowerPoint PPT Presentation
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40 x 4x – 20
Solve.
Warm up
1.
2y + 28 3y – 14°
2.
42
Questions over HW?Did you have hw?
Congruent triangles have 3 congruent sides and 3 congruent angles.
The parts of congruent triangles that “match” are called corresponding parts.
In a congruence statement
ORDER MATTERS!!!! Everything matches up.
NOV DAY
Complete each congruence statement.
CA
E
D
B
F
If ABC DEF,
then BC ___EF
Complete each congruence statement.
CA
E
D
B
F
If ABC DEF,
then A ___D
Complete each congruence statement.
CA
E
D
B
F
If ABC DEF,
then C ___F
Fill in the blanks
If CAT DOG,
then AC ___OD
Fill in the blanks
BAT MON
T ________ ONM_____ MONM ____
NATBBA
TB
Fill in the blanks
BCA ________ GFE
EGF
CAB
Complete the congruence statement.
_____ JKNMKL
Complete the congruence statement.
_____ CBDABD
There are 5 ways to prove
triangles congruent.
Side-Side-Side (SSS) Congruence Postulate
All Three sides in one triangle are congruent to all
three sides in the other triangle
Side-Angle-Side (SAS) Congruence Postulate
Two sides and the INCLUDED angle
(the angle is in between the 2 marked sides)
Angle-Angle-Side (AAS) Congruence Postulate
Two Angles and One Side that is NOT
included
Angle-Side-Angle (ASA) Congruence Postulate
Two angles and the INCLUDED side
(the side is in between the 2 marked angles)
There is one more way to prove triangles congruent, but