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Solving Real World Problems Using the Law of Cosines

Instructions:

Choose an answer and hit 'next'. You will receive your score and answers at the end.

question 1 of 3

What shape does the law of cosines help you to solve?

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1. How many sides of a triangle do you need to know in order to use the law of cosines?

2. Which angle do you need to know in order to use the law of cosines to find an unknown side?

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About this Quiz & Worksheet

Test your ability to use the law of cosine formula to solve for unknown sides and angles of triangles in this quiz and worksheet combo. Practice problems assess your knowledge of this mathematical formula.

Quiz & Worksheet Goals

In these assessments you'll be tested over your ability to:

  • Recall the definition of the law of cosines
  • Use the law of cosines to solve for sides and angles of triangles
  • Apply the law of cosines to real world scenarios to find measurements
  • Identify when the law of cosines formula can be used to solve for the length of a side

Skills Practiced

This quiz and worksheet allow students to test the following skills:

  • Knowledge application - use your knowledge of the law of cosines to solve mathematical problems
  • Information recall - access the knowledge you've gained regarding various functions
  • Problem solving - solve law of cosines practice problems to get a simplified answer

Additional Learning

To learn more about solving problems using the law of cosines, review the accompanying lesson called Solving Real World Problems Using the Law of Cosines. This lesson covers the following objectives:

  • Define Pythagorean Theorem
  • Differentiate between the different parts of the triangle
  • Understand why angles and sides of triangles are solved for with trigonometric formulas
  • Use the formulas of sine, cosine and tangent to solve equations
  • Find angles and sides for triangles using the Pythagorean Theorem
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