Download Congruence of Triangles 4.1, 4.2, 4.3

Congruence of
Triangles
4.1, 4.2, 4.3, 4.5, 4.6
By Brit Caswell
4.1 (The important bit)
You don’t always need to draw the picture!
Pg 221 Lesson Check
4
4
8
4
4
8
Are these triangles
Congruent?
Pg 229, #3
Would you use SAS, SSS, or neither to prove
that these triangle pairs are congruent?
A
B
C
D
Pg 238, #9
Name two triangles that are congruent by ASA.
Pg 239, #13
To use this theorem, you must meet three conditions:
• There are two right triangles.
• They have congruent hypotenuses.
• There is one pair of congruent legs.
You can also think about the converse of this statement:
If two angles (called base angles) of a triangle are congruent,
The sides opposite those angles are congruent. (Thm 4.4)