easy vertical angles

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

Front

Vertical angles are always:

Back

congruent (equal measures).

Front

Name a pair of vertical angles in the figure: ∠1 and ∠4, ∠6 and ∠5, ∠2 and ∠4, ∠1 and ∠6.

Back

∠1 and ∠4.

Front

This is what kind of angle? (If the angle is 90 degrees)

Back

right.

Front

Which are pairs of vertical angles? ∠COB & ∠COA, ∠AOD & ∠AOC, ∠COB & ∠AOD, ∠BOD & ∠AOD.

Back

∠COB & ∠AOD.

Front

What is the definition of congruent angles?

Back

Angles that have the same measure.

Front

If two angles are vertical angles, what can be said about their measures?

Back

They are equal.

Front

What is the relationship between vertical angles and adjacent angles?

Back

Vertical angles are not adjacent; they are opposite each other.

Front

If two lines intersect, how many pairs of vertical angles are formed?

Back

Two pairs of vertical angles.

Front

What is the sum of the measures of two adjacent angles that form a linear pair?

Back

180 degrees.