Parallel Lines cut by a Transversal

• Parallel Lines Postulate


  Given a line and a point which is not on the line, then there is exactly one line through the point that is parallel to the given line.
• Corresponding Angles Postulate


  If m || I and n intersects the two of them, then <1 and <2 are congruent. <1 and <2 are corresponding angles

  
• Corresponding angles are congruent