Vertical and Adjacent Angles

If ∠COB is 124°, what is the measure of its vertical angle ∠AOD?

• ∠AOD is 90°

• ∠AOD is 124°

• ∠AOD is 180°

• ∠AOD is 60°

What are adjacent angles?

• Two angles that share a common side and a common vertex but do not overlap.

• Two angles that are opposite each other when two lines intersect.

• Two angles that add up to 90 degrees.

• Two angles that are formed by two parallel lines and a transversal.

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

• Their measures are equal.

• Their measures are complementary.

• Their measures are supplementary.

• Their measures are adjacent.

Identify a pair of vertical angles from the following: ∠COB & ∠AOD, ∠AOC & ∠BOD.

• ∠COB & ∠AOD are vertical angles.

• ∠AOC & ∠BOD are vertical angles.

• ∠COA & ∠BOD are vertical angles.

• ∠AOB & ∠COD are vertical angles.

Name the vertical angle to ∠g.

• ∠h

• ∠j

• ∠i

• ∠k

What is the sum of the measures of two supplementary angles?

• 90°

• 180°

• 360°

• 120°

If ∠BOD is 56°, what is the measure of ∠COB?

• 124°

• 90°

• 110°

• 180°

What is the relationship between vertical angles and adjacent angles?

• Vertical angles are always greater than adjacent angles.

• Vertical angles are equal, while adjacent angles can be either complementary or supplementary.

• Adjacent angles are always equal, while vertical angles can vary.

• Vertical angles and adjacent angles are unrelated.

What are vertical angles?

• Angles that are adjacent to each other when two lines intersect.

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

• Angles that are supplementary to each other when two lines intersect.

• Angles that are complementary to each other when two lines intersect.

What type of angles are formed when two lines intersect?

• Acute angles and obtuse angles

• Vertical angles and adjacent angles

• Complementary angles and supplementary angles

• Reflex angles and straight angles