Modulus of a Complex Number: Definition & Examples


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What is a complex number?

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1. Which of the following does NOT describe the modulus of the complex number a + bi?

2. What is the modulus of the complex number -6 +8i?

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About This Quiz & Worksheet

You can quickly gauge how much you know about the modulus of complex numbers by using this quiz/worksheet assessment. You must be able to define relevant terms and apply concepts to solve given problems in order to do well on this short quiz.

Quiz & Worksheet Goals

When you take this quiz, you will be expected to know how to:

  • Define a complex number
  • Describe the modulus of a complex number
  • Solve practice problems that involve finding the modulus of a complex number

Skills Practiced

  • Problem solving - use acquired knowledge to solve practice problems, such as finding the modulus of 9 - i
  • Defining key concepts - ensure that you can accurately define a complex number
  • Interpreting information - verify that you can read information regarding what the modulus of a complex number is and interpret it correctly

Additional Learning

You can further explore this topic by reviewing the lesson called Modulus of a Complex Number: Definition & Examples. Details covered in this lesson include:

  • How many parts complex numbers have
  • What the term 'vector' refers to
  • Which theorem is used to find the modulus of a complex number