Things to Learn

  • Discover that corresponding angles, alternate interior angles, and alternate exterior angles of parallel lines are equal.
  • Realize that when these pairs of angles are equal, then lines are parallel.
  • Recognize that corresponding angles of parallel lines are equal because of properties related to translation.
  • Identify that alternate interior angles of parallel lines are equal because of properties related to rotation.
  • Present informal arguments to draw conclusions about angles formed when parallel lines are cut by a transversal.

Angles Associated with Parallel Lines

Exercise and Practice

Angles Associated with the End of Class