Triangle Angle Relationships Quiz Review

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

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

• 45°
• 90°
• 180°
• 360°

Find the missing angle.

Solve for x.

• 16
• 11
• 50
• 6

A student is trying to construct triangles using four different sets of angles. The angles in each set are given below. Which set will form a triangle?

• 45°, 65°, 70°

• 150°, 110°, 100°

• 50°, 50°, 50°

• 90°, 90°, 90°

What is the third angle of a triangle whose 1st angle is 79 and the 2nd angle is 43?

• 43
• 58
• 72
• 101

Solve for x.

• 16
• 11
• 50
• 6

To find the exterior angle measurement of a triangle, I add the __________ angles together.

• acute

• interior

• remote interior

• supplementary

What is the value of x?

• 71°

• 109°

• 116°

• 135°

What is the measure of x?

• 101°

• 111°

• 121°

• 131°