Proving Triangles Similar Algebraically

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• Offline Activity (.zip)

• GeoGebra Files

  1. Activity #1: The triangles below have two congruent angles. (.ggb)
     
  2. Activity #2: The two triangles below have side lengths that are proportional with a scale factor r. (.ggb)
     
  3. Activity #3: The two triangles below have two pairs of corresponding sides with proportional lengths, with scale factor r, and the INCLUDED angles are congruent to each other. (.ggb)