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    Absolute Value of a Complex Number

    How to calculate a complex number's absolute value

    The absolute value of a real number is its distance from 0 on the number line. A complex number's absolute value is also a measure of its distance from zero. However, instead of measuring this distance on the number line, a complex number's absolute value is measured from zero on the complex number plane.
    In general Absolute Value Formula
     Illustrated Example  
    Absolute Value of Complex Number


    To find the absolute value of the complex number, 3 + 4i, we find the distance from zero to that number on the plane.
    Practice Problems

    Calculate |5+ 12i|    answer  

    Practice Problem 1

      What is | 6 + 8i| ?