IM 8.1.14 Lesson: Alternate Interior Angles

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• Offline Activity (.zip)

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  1. Applet 1 (.ggb)
     
  2. Lines AC and DF are parallel. They are cut by transversal HJ. (.ggb)
     
  3. Using what you noticed, find the measures of the four angles at point B in the second diagram. Lines AC and DF are parallel. (.ggb)
     
  4. The next diagram resembles the first one, but the lines form slightly different angles. Work with your partner to find the six unknown angles with vertices at points B and E. (.ggb)
     
  5. Parallel lines l and m are cut by two transversals which intersect l in the same point. Two angles are marked in the figure. Find the measure x, of the third angle. (.ggb)
     
  6. Lines l and k are parallel and t is a transversal. Point M is the midpoint of segment PQ. Find a rigid transformation showing that angles MPA and MQB are congruent. (.ggb)
     
  7. In this picture, lines l and k are no longer parallel. M is still the midpoint of segment PQ. (.ggb)