Alternate Interior Angles: Lesson

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Concepts of alternate interior angles parallel the concepts of corresponding angles. Using a diagram, the presentation defines and identifies alternate interior angles formed by a transversal and two parallel lines. The video in a geometry playlist gives the properties of the alternate interior angles and uses that to solve problems.

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CCSS: Adaptable
Instructional Ideas

  • Develop an informal proof showing the alternate interior angles are congruent if formed by parallel lines
Classroom Considerations

  • The class should know how to solve multi-step linear equations
  • Start the video at 0:05 as the title graphic is incorrect

  • Works through several example problems
  • Contains a link to other CK-12 resources on alternate interior angles

  • None
Common Core