IM 7.1.2 Lesson: Corresponding Parts and Scale Factors

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• Offline Activity (.zip)

• GeoGebra Files

  1. A road sign for railroad crossings is a circle with a large X in the middle and two R’s. Here is a picture with some points labeled and two copies of the picture. Use the angle tool to compar (.ggb)
     
  2. Complete this table to show corresponding parts in the three pictures. (.ggb)
     
  3. Use the moveable angle tool to compare angle KLM with its corresponding angles in Copy 1 and Copy 2. (.ggb)
     
  4. Use the moveable angle tool to compare angle NOP with its corresponding angles in Copy 1 and Copy 2. (.ggb)
     
  5. Here is Triangle O, followed by a number of other triangles. (.ggb)
     
  6. List all the triangles that are scaled copies in the table. Record the side lengths that correspond to the side lengths of Triangle O listed in each column. (.ggb)