ANSWERS TO EVENS

2) I 4) IG6) BGI8) Definition of Congruent Triangles10) a) KRO b) S, K, CPCTC c) KO, CPCTC, SK d) angle R, CPCTC, alt int angles are congruent12) (7,2)

4-2 SOME WAYS TO PROVE TRIANGLES CONGRUENT

POSTULATES TO PROVE 2 TRIANGLES ARE CONGRUENT

SSS Side-Side-Side: If 3 sides of a ∆ are congruent to

3 sides of another ∆, then the ∆’s are congruent.

POSTULATES TO PROVE 2 TRIANGLES ARE CONGRUENT

SAS Side-Angle-Side: If 2 sides and the included

angle of a ∆ are congruent to 2 sides and the included angle of another ∆, then the ∆’s are congruent.

Included: in between the 2 sides

POSTULATES TO PROVE 2 TRIANGLES ARE CONGRUENT

ASA Angle-Side-Angle: If 2 angles and the included

side of a ∆ are congruent to 2 angles and the included side of another ∆, then the ∆’s are congruent.

Included: in between the 2 angles

GIVEN: OK BISECTS ANGLE MOT, OM = OTPROVE: ∆MOK = ∆TOK

Statement Reason

OK bisects angle MOT

OM = OT

Given

Definition of angle bisector

OK = OK Reflexive

∆MOK = ∆TOK SAS

1 2

M

K

T

O

1 2

TOO

Page 124 #4-9

Answers:4) Yes, ASA5) Yes, SSS6) Yes, SAS7) No8) No9) No

HOMEWORK

Worksheet 4-2 Flash Cards

SSS SAS ASA