Parallel Lines & Angles (Congruent)

Front

What are parallel lines?

Back

Lines in a plane that never meet and are always the same distance apart.

Front

What are angles formed by parallel lines and a transversal?

Back

Angles formed include corresponding angles, alternate interior angles, alternate exterior angles, and consecutive interior angles.

Front

Define vertical angles.

Back

Angles that are opposite each other when two lines intersect; they are always congruent.

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines in relation to a transversal; they are congruent.

Front

What are alternate interior angles?

Back

Angles that lie between two parallel lines and on opposite sides of a transversal; they are congruent.

Front

What are alternate exterior angles?

Back

Angles that lie outside two parallel lines and on opposite sides of a transversal; they are congruent.

Front

What are consecutive interior angles?

Back

Angles that lie on the same side of the transversal and inside the two parallel lines; they are supplementary.

Front

If two parallel lines are cut by a transversal, what can be said about the corresponding angles?

Back

They are congruent.

Front

If ∠1 and ∠2 are alternate interior angles, what can be said about their measures?

Back

They are equal.

Front

What is the relationship between vertical angles?

Back

Vertical angles are always congruent.