Classifying Complementary and Supplementary Angles

What types of angles have you already studied before learning about complementary and supplementary angles?

• Acute, obtuse, right, and straight angles

• Acute, obtuse, right, and full angles

• Acute, obtuse, reflex, and straight angles

• Acute, obtuse, right, and reflex angles

What is the sum of two complementary angles?

• 90 degrees

• 180 degrees

• 60 degrees

• 120 degrees

If one angle is 30 degrees, what is the measure of its complementary angle?

• 60 degrees

• 150 degrees

• 90 degrees

• 120 degrees

What is the sum of two supplementary angles?

• 90 degrees

• 120 degrees

• 180 degrees

• 360 degrees

If one angle is 120 degrees, what is the measure of its supplementary angle?

• 150 degrees

• 30 degrees

• 90 degrees

• 60 degrees

Which trick can help you remember that complementary angles add up to 90 degrees?

• Complementary angles form a straight line

• Complementary angles form a corner

• Supplementary angles form a corner

• Supplementary angles form a right angle

Which trick can help you remember that supplementary angles add up to 180 degrees?

• Supplementary angles form a corner

• Complementary angles form a straight line

• Supplementary angles form a straight line

• Complementary angles form a right angle

If one angle measures 40 degrees, what is the measure of its supplementary angle?

• 140 degrees

• 50 degrees

• 90 degrees

• 130 degrees

If one angle measures 12 degrees, what is the measure of its complementary angle?

• 78 degrees

• 68 degrees

• 88 degrees

• 58 degrees

If two angles are complementary and one angle is 2x degrees and the other is 3x degrees, what is the value of x?

• 15 degrees

• 18 degrees

• 20 degrees

• 22 degrees