Angle Relationships and Finding Missing Angles

Front

line m and line n are_____________________

Back

parallel lines

Front

What are supplementary angles?

Back

Angles that add up to 180°

Front

Find the missing angle if one angle is 69° and they are supplementary.

Back

111°

Front

Find m∠D if m∠D + 116° = 180°.

Back

64°

Front

Find the missing angle if one angle is 100° and they are complementary.

Back

80°

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What is the sum of angles on a straight line?

Back

180°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

If two angles are equal, what type of angles are they?

Back

They are called congruent angles.

Front

What is the relationship between parallel lines and a transversal?

Back

When a transversal crosses parallel lines, it creates corresponding angles that are equal.