Transcript 4.3: Congruent Triangle

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.
,
∠FDE, ∠DEF, ∠EFD
2. What is true about K and L? Why?
Angles K and L are congruent
Because of the Third angles theorem.
3.
What does it mean for two segments to be
congruent?
They all have the same measurement: angles and side lengths are the same.
4.3: Assignment
p. 234 #13-18, 23-26 and 38-45
4.3: Congruent Triangle
Objectives:
• To apply properties of congruent
triangles.
• To prove triangles congruent by using
the definition of congruence.
Supplies:
 Math Notebook
 notes
4.3: Congruent Triangle
Corresponding Corresponding
Angles
Sides
Diagram
B
∠ABC≅∠FDE
C
∠BCA≅∠DEF
D
A
∠CAB≅∠EFD
AB length of the side
F
E
AB=FD
4.3: Congruent Triangle
Parts in the same location of two
different figures.
Congruent Triangles:
• 3 pairs of  corresp. sides.
•3 pairs of  corresp. Angles.
Consecutive
Vertices
4.3: Assignment
p. 234 #13-18, 23-26 and 38-45