Please, subscribe. Then you can see when I'm doing a live stream. Here, I present some visualisation and calculation for the polar form of a complex numbers. This is important if you want to solve equations with complex numbers. I apologise for my pronunciation. The focus is on the mathematics and not my English skills :) (This exercise fits to lectures for students in their first year of study: Mathematics for physicists, Mathematics for the natural science, Mathematics for engineers, Linear algebra and so on)