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.

Concepts

angles, acute angles, obtuse angles, right angles

Show More Show Less

Additional Tags

math

Show More Show Less

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

4.MD.C.6