Lesson Plan: The Hinge Theorem Mathematics • 11th Grade

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to use the hinge theorem and its converse in triangles to find the possible range of a side length or angle in two triangles.


Students will be able to

  • use the hinge theorem and its converse to compare side lengths and angles of triangles.


Students should already be familiar with

  • the angle sum of a triangle,
  • the congruence of line segments.


Students will not cover

  • trigonometry.

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