Ever wondered how the radian can be found graphically? Here's one way to do it: Needed analogue tools: Dividers Pencil Straight Edge...

The following animations shows how to split the circumference of a given circle in 6 equal fragments: Needed analogue tools: Dividers...

The following technique shows how to copy an angle (on a piece of paper): Needed analogue tools: Dividers Pencil Straight Edge Eraser...