Introduce Bisectors. Teams Begin Models

  1. Introduce the perpendicular bisector theorem and its converse. Show students how to use these theorems. Introduce and teach the angle bisector theorem and its converse. Show students how to find the sum of the measures of an n-gon – (n-2)180 and explain the characteristics of a regular n-gon. Use the theorems to find values inside a shape both regular and not. Topics include:
    Perpendicular and Angle Bisectors
    Polygon Angle-Sum Theorem
  2. Prepare a short quiz on key terms and concepts. You can use this Khan Academy assessment on the polygon angle-sum theorem.

Tips and Tools

Use this Khan Academy video on bisectors. (11 minutes)

Teams should set a schedule for completion of the model in three working days and make sure all materials are in place. If using Google SketchUp or other tools, they should know how to use these tools.

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