Download Presentation
## Angle Relationships

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -

**Angle Relationships**Common Necessary Vocabulary for Parallel and Intersecting Lines**Parallel Lines**2 lines are parallel if the lie in the same plane and do not intersect. PARALLEL LINES INTERSECTING LINES**Transversal**A Transversal is any line that intersect two other lines. * *Common Mistake: The two lines the transversal intersect do not have to be parallel**Vertical Angles**Vertical Angles are any pair of angles opposite each other at an intersection VERTICAL ANGLE PAIRS are ALWAYS congruent and equal in measure.**Straight Angle Pair**Straight Angle Pairs are any pair of angles that form a straight line STRAIGHT ANGLE PAIRS are ALWAYS Supplementary (Adds up to 180°)**Corresponding Angles**Corresponding Angles are angles that lie in the same position at different intersections * *If two PARALLEL lines are cut by a transversal, then Corresponding Angles are Congruent**Alternate Interior Angles**Alternate Interior Angles are angles that lie on opposite sides of the transversal and on the Interior of the intersected lines * *If two PARALLEL lines are cut by a transversal, then Alternate Interior Angles are Congruent**Alternate Exterior Angles**Alternate Exterior Angles are angles that lie on opposite sides of the transversal and on the Exterior of the intersected lines * *If two PARALLEL lines are cut by a transversal, then Alternate Exterior Angles are Congruent**Same Side Interior Angles**Same Side Interior Angles are angles that lie on the same side of the transversal and on the Interior of the intersected lines * *If two PARALLEL lines are cut by a transversal, then Same Side Interior Angles are Supplementary