Parallel, Perpendicular, and Intersecting Lines

Front

What are parallel lines?

Back

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

Front

What are perpendicular lines?

Back

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

Front

What are intersecting lines?

Back

Lines that cross each other at one point, forming angles.

Front

How can you identify parallel lines in a diagram?

Back

They will never intersect and will maintain equal distance apart.

Front

What is the angle formed by perpendicular lines?

Back

Four right angles (90 degrees each).

Front

What is the relationship between intersecting lines and angles?

Back

They can form various angles, including acute, obtuse, and right angles.

Front

What is the definition of a transversal line?

Back

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

Front

What is the significance of corresponding angles when two lines are crossed by a transversal?

Back

Corresponding angles are equal when the lines are parallel.

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two lines; they are equal if the lines are parallel.

Front

What are consecutive interior angles?

Back

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