Introduce Key Concepts and Vocabulary

  1. Review key terms:
    Hypotenuse
    Leg
  2. Introduce the hypotenuse-leg theorem (HL theorem). Have students find measures of segments, algebraically, given the triangles are congruent by the HL theorem. 
  3. Show students multiple sets of triangles where at least two overlap and show the students how to separate and identify parts that they share (have in common).
  4. Allow additional time for design, if necessary.

Tips and Tools

Use this Khan Academy activity on measuring segments algebraically.

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