Triangle Sum

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 

• 45°
• 90°
• 180°
• 360°

_{What type of angle is shown?}

• a 90 degree angle
• a 180 degree angle
• an acute degree angle
• an obtuse angle

Find the measure of the missing angle.

• 47

• 57

• 53

• 133

What is the measure of the missing angle?

• 82
• 43
• 55
• 180

Solve for x.

• 5
• 12
• -7
• -6

Solve for x.

• 8
• -10
• -7
• 6

<2 and <8 are ____________________.

• Alternate exterior angles

• Alternate interior angles

• Same side exterior angles

• Vertical angles

Name a pair of alternate interior angles.

• <c & <d

• <a & <b

• <a & <c

• <a & <d

Name the relationship of <1 and <2

• Vertical angles

• Corresponding angles

• Supplementary angles

• Complementary angles

Find the measure of the angle indicated. 

• 139°
• 66°
• 138°
• 116°