VO C A B U L A RY

UNIT 3

PARALLEL LINES

• Lines on the same plane that never intersect

INTERSECTING LINES

• Two lines that have one point in common

PARALLEL PLANES

• Planes that never intersect

PERPENDICULAR LINES

• Lines that intersect to form right angles (90⁰)

SKEW LINES

• Lines on different planes that never intersect

TRANSVERSAL

• A line that intersects two lines at different points

CORRESPONDING ANGLES

• Angles in the same position when two lines are cut by a transversal• Their measures are equal to each other

ALTERNATE INTERIOR ANGLES

• Angles between the parallel lines on opposite sides of the transversal• Their measures are equal to each other

ALTERNATE EXTERIOR ANGLES

• Angles outside the parallel lines on opposite sides of the transversal• Their measures are equal to each other

CONSECUTIVE INTERIOR ANGLES

• Angles that are between the lines on the same side of a transversal• Their sum is 180⁰