Estimating Angles

Sometimes, exact measurements aren't necessary. Scholars learn to estimate the measure of angles by watching a useful video. The method employed here is to use 90-, 180-, and 270-degree angles as benchmarks, adding or subtracting as necessary.

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CCSS: Adaptable
Instructional Ideas

  • Use the video as an intervention tool
Classroom Considerations

  • Pupils should be familiar with 90-degree, 180-dgree, 270-degree, and 360-degree angles
  • Video assumes learners know how to use protractors
Pros

  • Provides a worksheet with additional problems
Cons

  • Rays of the angles in the video are thickly drawn, which makes measuring accurately rather difficult
Common Core