Triangle Angle Sum Theorem

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  1. Triangle Angle Sum Theorem (.ggb)
     
  2. 3. What type of triangle is triangle ABC? (.ggb)
     
  3. 4. What type of triangle is triangle RST? (.ggb)
     
  4. 5. Find the measure of <1. (.ggb)
     
  5. 6. Find the measure of Angle A. (.ggb)
     
  6. 7. Find the measure of Angle Y. (.ggb)
     
  7. Prove the triangle angle sum theorem by using parallel lines (.ggb)