Lesson Plan

Putting the Law of Cosines and the Law of Sines to Use

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Use the Law of Cosines and the Law of Sines to solve problems using the sums of vectors. Pupils work on several different types of real-world problems that can be modeled using triangles with three known measurements. In the process, scholars decide which method will work best to solve the problems. 

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Have the class create a table on what kinds of triangles can be solved using the two different laws
  • Instruct students to draw diagrams that represent the scenario in the problems
Classroom Considerations
  • The class should be familiar with the Law of Cosines and the Law of Sines
  • The lesson is the 11th in a series of 16
Pros
  • Includes answers to the problems and questions in the examples
  • Provides suggestions for English learners
Cons
  • None
Common Core