Vertical angles

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always congruent (equal in measure).

Front

Which pairs of angles are vertical angles?

Back

∠COB & ∠AOD are vertical angles.

Front

What is the relationship between vertical angles?

Back

Vertical angles are always congruent (equal measures).

Front

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

Back

Their measures are equal.

Front

Find X: If ∠AOD = 59°, what is ∠COB?

Back

∠COB = 59° (because they are vertical angles).

Front

Find X: If ∠AOC = 27°, what is ∠BOD?

Back

∠BOD = 27° (because they are vertical angles).

Front

Find X: If ∠COA = 30°, what is ∠AOD?

Back

∠AOD = 30° (because they are vertical angles).

Front

Find X: If ∠COB = 53°, what is ∠AOD?

Back

∠AOD = 53° (because they are vertical angles).

Front

What type of angles are vertical angles?

Back

Vertical angles are always congruent (equal measures).

Front

If two angles are adjacent, can they be vertical angles?

Back

No, vertical angles are not adjacent; they are opposite each other.