What is Diameter? - Definition & Formula


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question 1 of 3

Which of the following is the diameter?

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1. If the radius is 3 inches, what is the diameter of the same circle?

2. If the diameter of a particular circle is 10 centimeters, what is its radius?

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About This Quiz & Worksheet

This quiz and worksheet combination will help gauge your knowledge of a circle's diameter. To pass this quiz, you will also need to have an understanding of other concepts regarding circle measurements.

Quiz & Worksheet Goals

You can use these assessment tools to assess your knowledge of:

  • Definition of diameter
  • Finding diameter, given the radius and vice versa
  • Calculating diameter, given the circumference

Skills Practiced

  • Defining key concepts - make sure that you can correctly define key words, such as radius and circumference
  • Problem solving - use acquired knowledge to solve diameter practice problems
  • Information recall - access the knowledge you gained regarding pi (3.14)
  • Knowledge application - use this understanding to answer questions about diameter's relation to circumference

Additional Learning

To learn more about diameter and circles in general, review the corresponding lesson titled What is Diameter? - Definition & Formula. The lesson covers:

  • The definition of radius and diameter
  • Various formulas for finding diameter
  • General explanation of pi (3.14)