The Exterior Angles of a Triangle
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The Exterior Angles of a Triangle. Objective: Students will solve problems that involve an exterior angle of a triangle. Note: An exterior angle of a triangle is equivalent to the sum of its two non-adjacent interior angles. . Example #1: Find x. x. 120 . 40. Example #2: Find x. 5x.

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The Exterior Angles of a Triangle

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The exterior angles of a triangle

The Exterior Angles of a Triangle

Objective: Students will solve problems that involve an exterior angle of a triangle.


The exterior angles of a triangle

Note: An exterior angle of a triangle is equivalent to the sum of its two non-adjacent interior angles.


The exterior angles of a triangle

Example #1: Find x.

x

120

40


The exterior angles of a triangle

Example #2: Find x.

5x

2(4x – 30)

x + 20


The exterior angles of a triangle

Example #3: Find x, then find the measure of the interior angles at A and B.

4x + 10

3x – 20

A

5(x – 14)

B

mA= 3(25) – 20 = 55

mB= 5(25 – 14) = 55


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