Discovering Dilations

Scale up the dilation factor. Using a dynamic geometry software program, classmates discover the relationship between a pre-image and its image after performing a dilation. Individuals create their own dilations and fellow class members try to determine the scale used.

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CCSS: Designed
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Instructional Ideas
  • Spend one class period allowing the pupils to become familiar with the software and its tools
  • Have individuals print their dilations for the What's My Scale activity
Classroom Considerations
  • Pupils need access to GeoGebra
  • Includes a document to explain the software tools needed for the lesson
  • Contains answer keys
  • Provides timing suggestions for each activity and section of the lesson
  • None