How Do You Measure the Immeasurable?

How do you measure a distance where the measurement tool will not reach? Pupils use the concept of similar triangles to perform indirect measurements. The lesson asks teachers to demonstrate the method and lead the class through a set of problems.

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CCSS: Designed
Instructional Ideas

  • Conduct a quick review of finding missing sides in similar figures
  • Review ways to show two triangles are similar
Classroom Considerations

  • Individuals should know properties of similar triangles
Pros

  • Contains a PowerPoint to guide the instruction
  • Answer keys show the work necessary to arrive at the solution
Cons

  • None
Common Core