## Quick Reference

(in the complex plane)

If *P*_{1} and *P*_{2} represent the complex numbers *z*_{1} and *z*_{2}, the distance |*P*_{1}*P*_{2}| is equal to |*z*_{1}−*z*_{2}|, the modulus of *z*_{1}−*z*_{2}.

*Subjects:*
Mathematics.

Overview

Bogardus social distance scale

distance between two codewords

distance from a point to a line

(in the complex plane)

If *P*_{1} and *P*_{2} represent the complex numbers *z*_{1} and *z*_{2}, the distance |*P*_{1}*P*_{2}| is equal to |*z*_{1}−*z*_{2}|, the modulus of *z*_{1}−*z*_{2}.

*Subjects:*
Mathematics.