Between-Figure and Within-Figure Ratios

Tie the unit together and see concepts click in your young mathematicians' minds. Scholars apply the properties of similar triangles to find heights of objects. They concentrate on the proportions built with known measures and solve to find the unknown measures. 

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CCSS: Designed
Instructional Ideas

  • Take the class outside and conduct measurements to determine heights of actual structures
  • Provide examples without images for learners to practice drawing pictures from descriptions
Classroom Considerations

  • Pupils should understand proportionality and be able to solve proportions prior to this lesson
  • Builds on concepts developed in the previous fifteen lessons in this 36-part series
Pros

  • The lesson takes time to investigate the different proportions that are possible for the same figures
  • Concepts in the lesson demonstrate trigonometric ratios
Cons

  • None