When I was at school I just had normal 30cm rulers, plain and straight, quite boring really. Granted I didn’t do anything that required a ruler as complicated as the Koala Versa Ruler.
The Versa ruler from Koala Tools is the first scalable system of rulers which allows for the fluid creation of unlimited, multi-sided shapes.
The Versa ruler is not only for architects but can be used in quilting, in the classroom and in the woodworking workshop.
Website: Koala Tools