Geometry Chapter 3 Section 1-3 Flashcard

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They have the same slope.

Front

What is the relationship between parallel lines and their slopes?

Back

Parallel lines have the same slope.

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees).

Front

What are consecutive interior angles?

Back

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

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are in the same position on two parallel lines in relation to a transversal.

Front

What are 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

What is a transversal?

Back

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

Front

How do you identify vertical angles?

Back

Vertical angles are identified as the angles that are opposite each other when two lines intersect.

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.