Warm Up

1. Name all sides and angles of ∆FDE.

2. What is true about K and L? Why?

3. What does it mean for two segments to be congruent?

Warm Up

1. Name all sides and angles of ∆FDE.

2. What is true about K and L? Why?

3. What does it mean for two segments to be congruent?

They all have the same measurement: angles and side lengths are the same.

, ∠FDE, ∠DEF, ∠EFDAngles K and L are congruentBecause of the Third angles theorem.

4.3: Assignment

p. 234 #13-18, 23-26 and 38-45

4.3: Congruent TriangleObjectives:

• To apply properties of congruent triangles.

• To prove triangles congruent by using the definition of congruence.

Supplies: Math Notebook notes

4.3: Congruent Triangle

Diagram Corresponding Angles

Corresponding Sides

B

A

C

F

E

D

∠ABC≅∠FDE∠BCA≅∠DEF∠CAB≅∠EFD

AB length of the side

AB=FD

4.3: Congruent Triangle

Consecutive Vertices

Parts in the same location of two different figures.

Congruent Triangles:• 3 pairs of corresp. sides.•3 pairs of corresp. Angles.

4.3: Assignment

p. 234 #13-18, 23-26 and 38-45