Mastering Angles in Geometry

What is the measure of angle A if angle B is 40° and they are complementary?

• 50°

• 70°

• 60°

• 30°

If two angles are supplementary and one measures 75°, what is the measure of the other angle?

• 120°

• 105°

• 135°

• 90°

Calculate the missing angle in a triangle if the other two angles are 50° and 60°.

• 70°

• 90°

• 80°

• 40°

In a right triangle, if one angle is 30°, what is the measure of the other non-right angle?

• 60°

• 45°

• 75°

• 90°

If angle X is 3 times angle Y and they are complementary, what are the measures of angles X and Y?

• Angle X is 90 degrees and angle Y is 0 degrees.

• Angle X is 60 degrees and angle Y is 30 degrees.

• Angle X is 45 degrees and angle Y is 15 degrees.

• Angle X is 67.5 degrees and angle Y is 22.5 degrees.

What is the measure of an exterior angle if the two remote interior angles are 45° and 55°?

• 120°

• 90°

• 110°

• 100°

If angle A measures 120° and angle B measures 60°, are they complementary or supplementary?

• They are supplementary.

• They are equal angles.

• They are complementary.

• They are neither complementary nor supplementary.

In a quadrilateral, if three angles measure 90°, 85°, and 95°, what is the measure of the fourth angle?

• 75°

• 90°

• 100°

• 80°

If angle C is 20° less than angle D and they are supplementary, what are the measures of angles C and D?

• Angle C is 60°, Angle D is 80°.

• Angle C is 80°, Angle D is 100°.

• Angle C is 90°, Angle D is 110°.

• Angle C is 70°, Angle D is 90°.

What is the measure of an angle that is twice as large as its complement?

• 60 degrees

• 90 degrees

• 30 degrees

• 45 degrees