VOCABULARY 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 (90 ⁰ )
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 180 ⁰