Angles and Angle Relationships

What are supplementary angles?

• Two angles whose measures add up to 90 degrees.

• Two angles whose measures add up to 180 degrees.

• Two angles that are adjacent to each other.

• Two angles that are equal in measure.

What is the relationship of the angles a and c below?

• Vertical.

• Adjacent.

• Complementary.

• Supplementary.

If two angles are vertical, what can we say about their measures?

• They are congruent.

• They are supplementary.

• They are complementary.

• They are adjacent.

What are complementary angles?

• Two angles whose measures add up to 90 degrees.

• Two angles that are equal in measure.

• Two angles that add up to 180 degrees.

• Two angles that are adjacent to each other.

What is an example of a pair of complementary angles?

• 45° and 45°

• 60° and 30°

• 81° and 9°

• 70° and 20°

Find the value of x if x + 45 = 90.

• 30

• 45

• 60

• 75

If angle A is 30 degrees, what is the measure of its complement?

• 45 degrees

• 60 degrees

• 90 degrees

• 75 degrees

What is the definition of corresponding angles?

• Angles that are in the same position on different parallel lines cut by a transversal.

• Angles that are equal in measure and opposite each other when two lines intersect.

• Angles that are adjacent and share a common vertex.

• Angles that are formed when a transversal crosses two parallel lines and are on the same side.

What is the definition of adjacent angles?

• Angles that share a common side and a common vertex.

• Angles that are opposite each other when two lines intersect.

• Angles that add up to 90 degrees.

• Angles that are formed by two rays with a common endpoint.

What is the sum of the angles in a triangle?

• 90 degrees

• 180 degrees

• 360 degrees

• 120 degrees