Proof using Complex Numbers: Ptolemy's Theorem
8:06
Solving a Complex Equation
32:54
Ptolemy’s Theorem and the Almagest: we just found the best visual proof in 2000 years
10:59
A Ridiculous Approximation
21:46
Complex Numbers Have More Uses Than You Think
30:31
Climbing past the complex numbers.
12:05
Three pretty geometric theorems, proved by complex numbers
8:54
Angle Sum Formulae: Proof using Ptolemy's Theorem
19:14