A napkin is folded so that a corner coincides with the midpoint of an opposite edge. Investigate the three triangles formed.
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects its vertical and horizontal movement at each stage.
This page contains activities for use outside of the classroom, in maths clubs or as liaison activities between primary and secondary schools.
When a strip has vertical symmetry there always seems to be a second place where a mirror line could go. Perhaps you can find a design that has only one mirror line across it. Or, if you thought that was impossible, could you explain why ?
This article for teachers describes a joint project in 2007/8 with Haringey Local Authority and NRICH to support improving using and applying mathematics, reasoning and creativity.
What's the largest volume of box you can make from a square of paper?
