Education Technology

WA: Circles on the Complex Plane

by Peter Fox


Understand circle equations on the complex plane both algebraically and geometrically.


  • Modulus
  • Argand Plane
  • Cartesian Plane

About the Lesson

The lesson starts in familiar territory, the real number line. What numbers are 3 units away from the number 2? From here this question translates to “What imaginary numbers are 3 units away from z = 2? The simple algebraic translation is followed by a geometric representation, sample questions and then finally a more challenging problem to solve.