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.

AUG DAY

Corresponding Parts of Congruent Triangles are Congruent

Complete each congruence statement.

If ABC DEF,

then BC ___EF

Complete each congruence statement.

If ABC DEF,

then A ___D

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

it’s only for RIGHT TRIANGLES…Hypotenuse Leg

}Your Only Ways To Prove

Triangles Are Congruent

NO BAD WORDS

3 markings you can add if they aren’t marked

already

Overlapping sides are congruent in each

triangle by the REFLEXIVE property

Vertical Angles are congruent

Alt Int Angles are congruent

given parallel

lines

Homework WS