Parallel and Perpendicular 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 are perpendicular lines?

Back

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

Front

How can you identify parallel lines in a diagram?

Back

Parallel lines can be identified by looking for lines that are equidistant from each other and do not intersect.

Front

What is the relationship between intersecting lines?

Back

Intersecting lines are lines that cross each other at one or more points.

Front

What is the angle formed by perpendicular lines?

Back

The angle formed by perpendicular lines is 90 degrees.

Front

Can two lines be both parallel and perpendicular?

Back

No, two lines cannot be both parallel and perpendicular; they are mutually exclusive.

Front

What is a transversal line?

Back

A transversal line is a line that crosses at least two other lines.

Front

What types of angles are formed when a transversal intersects parallel lines?

Back

When a transversal intersects parallel lines, it forms corresponding angles, alternate interior angles, and alternate exterior angles.

Front

What is the significance of corresponding angles in parallel lines?

Back

Corresponding angles are equal when a transversal intersects parallel lines, which is a key property used in proofs.

Front

What is a parallelogram?

Back

A parallelogram is a four-sided figure (quadrilateral) with opposite sides that are parallel and equal in length.