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This Distance Between Two Polar Coordinates: Exploring Changes in Angle and Radius interactive also includes:
Get straight answers on a curved grid. An interactive has learners apply the Law of Cosines to find the distance between two points on the polar coordinate plane. The pupils use the radii lengths and the angle between the two radii to find the length of the third side of a triangle.
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CCSS:
Adaptable
Concepts
Additional Tags
Instructional Ideas
- Have the class members investigate whether the subtraction order of the angles will affect the solution
Classroom Considerations
- The class should know how to plot points in polar form
- Access requires signing up for a free CK-12 account
Pros
- Provides the opportunity to see the correct answer if users select the wrong one
- Includes hints and feedback to some of the problems
Cons
- The second question does not take into consideration that cosine is an even function