Congruence of Triangles 4.1, 4.2, 4.3, 4.5, 4.6

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Presentation transcript:

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 Are these triangles Congruent? 8

Pg 229, #3 Would you use SAS, SSS, or neither to prove that these triangle pairs are congruent? A B C D

Name two triangles that are congruent by ASA. 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)