Math on Triangles

Find the measure of the missing angle.

• 45 degrees
• 135 degrees
• 90 degrees
• 50 degrees

Find the measure of the missing angle.

• 154 degrees
• 26 degrees
• 180 degrees
• 64 degrees

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.

Which are pairs of vertical angles?

• ∠COB & ∠COA
• ∠AOD & ∠AOC
• ∠COB & ∠AOD
• ∠BOD & ∠AOD

What is x

• 154
• 156
• 165
• 123

What is the measure of the missing angle?

• 9
• 109
• 89
• 96

Angles whose measure sum up to 180 degrees.

• Vertical
• Adjacent
• Complementary
• Supplementary

If m∠1 = 30°, then m∠3 = 

• 30°
• 60°
• 150°
• undetermined

A triangle has angle measurements of 74°, 90°, and 16°. What kind of triangle is it?

• acute triangle
• right triangle
• obtuse triangle
• none of the above

A triangle has angle measurements of 26°, 59°, and 95°. What kind of triangle is it?

• acute triangle
• right triangle
• obtuse triangle
• none of the above