Unit 3: Parallel and Perpendicular Lines Flashcards
Two lines are ________ _____ when they will never intersect, and are coplanar.
Have the same slope.
Parallel Lines
Two lines are ____ _____ when they will never intersect and are not coplanar.
Skew Lines
________ _______ are lines that intersect and form a right angle.
Perpendicular Lines
Two angles are _____________ ______ when they have corresponding positions.
Corresponding Angles
Two angles are _________ ________ ______ when they lie in between the two lines and on opposite sides of the transversal.
Alternate Interior Angles
Two angles are _________ _________ ______ when they lie outside the two lines and on opposite sides of the transversal.
Alternate Exterior Angles
Two angles are ___________ ________ ______ when they lie between the two lines and on the same side of the transversal.
Consecutive Interior Angles
Name the Postulate: If there is a line and a point not on the line, then there is exactly one line through the point parallel to the given line.
Parallel Postulate
Name the Postulate: If there is a line and a point not on the line, then there is exactly one line through the point perpendicular to the given line.
Perpendicular Postulate
Name the Theorem: If two parallel lines are cut by a transversal, then the pairs of corresponding angles are congruent.
Corresponding Angles Theorem
Name the Theorem: If two parallel lines are cut by a transversal, then the pairs of alternate interior angles are congruent.
Alternate Interior Theorem
Name the Theorem: If two parallel lines are cut by a transversal, then the pairs of alternate exterior angles are congruent.
Alternate Exterior Angles Theorem
Name the Theorem: If two parallel lines are cut by a transversal, then the pairs of consecutive interior angles are supplementary.
Consecutive Interior Angles Theorem
