Vertical Angles and Linear Pairs

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

Front

Which angles are pairs of vertical angles?

Back

∠COB & ∠AOD.

Front

If m∠1 = 30°, what is m∠3?

Back

30°.

Front

What is the measure of the missing angle if it is given that m∠1 = 30° and m∠2 = 50°?

Back

20°.

Front

Are vertical angles always congruent?

Back

Yes, vertical angles are always congruent (equal measures).

Front

What is a linear pair of angles?

Back

A pair of adjacent angles formed when two lines intersect, which are supplementary.

Front

If two angles form a linear pair, what is the sum of their measures?

Back

The sum of their measures is 180°.

Front

Can vertical angles be adjacent?

Back

No, vertical angles are never adjacent; they are opposite each other.

Front

What is the relationship between vertical angles and linear pairs?

Back

Vertical angles are not linear pairs; linear pairs are adjacent and supplementary.

Front

If m∠A = 40° and m∠B is a vertical angle to ∠A, what is m∠B?

Back

m∠B = 40°.