MESSY WORKINGS

I want to share a neat trick to remembering some trigonometric identities. I first learnt that this is called the Johnson Diagram, but...

The Fold and Cut Theorem (yes, that is it's real name) states that for any shape made up of straight lines on a piece of paper, it is...

This is a short post. While writing the previous post about the trapezoidal Koch curve, there was a part of me that wanted to make the...