In this activity, students make their own folded paper polygon to explore shapes up close.
Flexagons are folded paper polygons that have the fascinating property of changing their faces when they are flexed. Flexagons can be made from a pattern of squares or equilateral triangles. A tetra-tetra-flexagon is made from a folded paper rectangle that is 4 squares long and 3 squares wide. This pattern for a tetra-tetra flexagon is from Jill Britton, a mathematician at Camosun College in Victoria