Making Scale Drawings Using the Ratio Method

Is that drawn to scale? Capture the artistry of geometry using the ratio method to create dilations. Mathematicians use a center and ratio to create a scaled drawing. They then use a ruler and protractor to verify measurements. 

37 Views 25 Downloads
CCSS: Designed
Instructional Ideas

  • Show scholars how to use a graphic organizer to record new vocabulary, notation, and diagrams
  • Use graph paper to create the dilations and use the distance formula or Pythagorean Theorem to verify lengths
Classroom Considerations

  • Pupils need rulers and protractors
  • The second lesson in a 36-part series
Pros

  • Uses a real-life example to illustrate the application of dilations
  • The lesson carefully connects the process to the properties of a dilation
Cons

  • None