Angles Definitions

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What does the term 'congruent' mean in relation to angles?

Back

It means that the angles are equal to each other.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What are parallel lines?

Back

Lines that never intersect and are always the same distance apart.

Front

What are perpendicular lines?

Back

Lines that intersect at a right angle (90°).

Front

If two angles are complementary, what is their sum?

Back

90°.

Front

If two angles are supplementary, what is their sum?

Back

180°.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal to each other.

Front

What is an example of complementary angles?

Back

30° and 60° are complementary angles because they add up to 90°.