Scale Factors

Is it bigger, or is it smaller—or maybe it's the same size? Individuals learn to describe enlargements and reductions and quantify the result. Lesson five in the series connects the creation of a dilated image to the result. Pupils understand that the ratio used to create the dilation is the scale factor of the image. 

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CCSS: Designed
Instructional Ideas

  • Form collaborative groups and assign different practice problems; have each group present their problem to the entire class
  • Instruct pupils to use graph paper to help find measurements
Classroom Considerations

  • Learners should already be comfortable with the concept of a dilation and how to create a dilation

  • The lesson scaffolds the examples to lead to the desired concept
  • Includes an opening activity and exit ticket along with independent practice problems

  • None