Bisecting Angles and Line Segments

Divide figures in two using basic construction tools. A lesson introduces the steps to conduct two basic constructions. Using a straightedge and a compass, pupils bisect angles and create the perpendicular bisector of a line segment. Learners have several opportunities to master the skill.

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CCSS: Designed
Instructional Ideas

  • Lead a discussion on the geometric proof of why the constructions provide the desired results
  • Show the class how to perform the constructions using paper folding and/or geometric software
Classroom Considerations

  • Individuals should know how to use a compass and straightedge for constructions
Pros

  • Includes a set of step-by-step instructions for each construction
  • Contains a summative assessment for the lesson objectives 
Cons

  • None
Common Core