exterior angle of a triangle 2015.notebook
September 16, 2015
9/16/15
Objective: How do we find the exterior angle of a triangle?
Do now: Copy the diagram and solve for x
57
42
x
Dec 2­2:11 PM
1
exterior angle of a triangle 2015.notebook
September 16, 2015
Sep 16­7:48 AM
2
exterior angle of a triangle 2015.notebook
September 16, 2015
Exterior angle Theorem: The exterior angle of a triangle is equal to the sum of the remote interior 1
angles
4
3
4
1
2
2
3
< 2 + ____ = 180 degrees
<1 + <2 = _____
<1 + ____ = < 4
<1 + <2 + <3 = _____
<1 + < 2 + < 3 = _______
< 3 + < 4 = ______
Sep 8­2:04 PM
3
exterior angle of a triangle 2015.notebook
September 16, 2015
1) Find the measure of < TUS
2)
E
Solve for x
38
56
U
72
x
S
T
Dec 2­2:20 PM
4
exterior angle of a triangle 2015.notebook
September 16, 2015
Dec 2­2:21 PM
5