# How do you find #abs(0 - 4i )#?

##### 1 Answer

Mar 27, 2016

4

#### Explanation:

Given a complex number x + iy , then it's magnitude is found

using ' Pythagoras' theorem' , as follows.| x + iy | =

#sqrt(x^2 + y^2) #

#rArr |0 - 4i | = sqrt(0^2 + (-4)^2) = sqrt16 = 4 #