The Fold and Cut Theorem proves that it is possible to cut any straight-edged shape out of a piece of paper with a single straight cut. Provided you fold the paper the correct way first.
Challenge yourself to cut out our Halloween bat!
Equipment needed
Scissors
More Information
In this video, Matt Parker (founder of Think Maths) shows how he folds paper to cut out a bat shape. The bat he makes is ever so slightly different from the bat shape in the resource, but the principle is the same! (He starts by showing the folds without reference to a diagram, and then later shows the folds with a diagram drawn also).
For more about the Fold and Cut Theorem, do watch this wonderful Numberphile video: