Computing Actual Lengths from a Scale Drawing

Class members take scale drawings and examine scales to determine distances in the actual objects. Pupils convert the scales of different units to scale factors that can be used in proportional equations. 

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Lead a discussion about the difference between scale and scale factor and when it is appropriate to use each
  • Provide a scale drawing of the school and have the class determine the actual size of the classroom
Classroom Considerations
  • The class should be familiar with finding constants of proportionality
  • The 18th segment in a 22-part unit
  • The answer keys show the calculations used to arrive at the solutions
  • Includes scaffolding on points that might be difficult for some
  • None
Common Core