Exterior Angle Theorem

The measure of an exterior angle of a triangle is equal to the sum of the measures of its remote interior angles.
m∠4 = m∠1 + m∠2

• Triangle Sum Theorem

• Exterior Angle Theorem

• Third Angles Theorem

• Congruent Triangles Theorem

Find the measure of the indicated angle. 

• 95°

• 85°

• 35°

• 45°

Find the measure of the indicated angle. 

• 26

• 36

• 85

• 144

Which of the following terms best describes Angle d?

• Remote interior angle

• Corresponding angle

• Exterior angle

• Interior angle

Find the indicated angle. (What is ?)

• 91°

• 81°

• 89°

• 109°

What is the measure of angle b?

• 36^o

• 56^o

• 63^o

• 117^o

Find the indicated angle measure. (What is ?)

• 51°

• 37°

• 167°

• 41°

Solve for x

• 49

• 58

• 70

• 94

Solve for x

• 70

• 23

• 120

• 130

Solve for x

• 60

• 120

• 40

• 65