Parallel Lines

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet; they are always the same distance apart.

Front

What is the Alternate Interior Angles Theorem?

Back

The Alternate Interior Angles Theorem states that if two parallel lines are cut by a transversal, then each pair of alternate interior angles is equal.

Front

Define Vertical Angles.

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

What are Alternate Exterior Angles?

Back

Alternate exterior angles are pairs of angles that lie outside the two lines and on opposite sides of the transversal.

Front

How do you identify corresponding angles?

Back

Corresponding angles are the angles that are in the same position at each intersection where a transversal crosses two lines.

Front

What is the Corresponding Angles Postulate?

Back

The Corresponding Angles Postulate states that if two parallel lines are cut by a transversal, then each pair of corresponding angles is equal.

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is always 180 degrees.

Front

How can you determine if two lines are parallel using angle relationships?

Back

If a transversal intersects two lines and the alternate interior angles are equal, then the lines are parallel.

Front

What is a transversal?

Back

A transversal is a line that crosses at least two other lines in the same plane.

Front

What are same-side interior angles?

Back

Same-side interior angles are pairs of angles that lie between the two lines and on the same side of the transversal.