Interior Angle Relationships

What are supplementary angles?

• Angles that add up to 180°
• Angles that add up to 90°
• Angles that are equal to each other
• Angles that are opposite of each other when lines intersect

What are complementary angles?

• Angles that add up to 180°
• Angles that add up to 90°
• Angles that are equal to each other
• Angles that are opposite of each other when lines intersect.

What are opposite angles?

• Angles that are adjacent to each other

• Angles that add up to 180°

• Angles that are opposite of each other when lines intersect

• Angles that add up to 90°

Which pair of angles are alternate interior angles?

• Angle 7 and Angle 4

• Angle 3 and Angle 6

• Angle 8 and Angle 1

• Angle 2 and Angle 8

Which pair of angles are corresponding?

• Angle 7 and Angle 4

• Angle 3 and Angle 6

• Angle 8 and Angle 1

• Angle 4 and Angle 8

Which of these angles is NOT congruent to angle 5?

• Angle 6

• Angle 8

• Angle 1

• Angle 4

Determine the missing angle.

• 47

• 57

• 53

• 133

Determine the missing angle.

• 145

• 55

• 35

• 45

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

• 45°
• 90°
• 180°
• 360°

• 60°

• 120°

• 90°

• 180°