Parallel and Perpendicular Lines Flashcards

Flashcards reviewing key concepts related to parallel and perpendicular lines, transversals, and angle relationships.

Parallel lines

Lines that do not intersect.

Skew lines

Lines that do not intersect and are not coplanar.

Parallel planes

Planes that do not intersect.

Corresponding angles

Angles that have corresponding positions.

Alternate interior angles

Angles that lie between the two lines and on opposite sides of the transversal.

Alternate exterior angles

Angles that lie outside the two lines and on opposite sides of the transversal.

Consecutive interior angles

Angles that lie between the two lines and on the same side of the transversal.

Corresponding Angles Theorem

If two parallel lines are cut by a transversal, then the pairs of corresponding angles are congruent.

Alternate Interior Angles Theorem

If two parallel lines are cut by a transversal, then the pairs of alternate interior angles are congruent.

Alternate Exterior Angles Theorem

If two parallel lines are cut by a transversal, then the pairs of alternate exterior angles are congruent.

Consecutive Interior Angles Theorem

If two parallel lines are cut by a transversal, then the pairs of consecutive interior angles are supplementary.

Transversal

Line that intersects

Perpinduclar

intersecting at 90 degrees

What is this

Perpendicular

What is this

Parallel