Follow the diagrams to make this patchwork piece, based on an octagon in a square.
Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.
Semi-regular tessellations combine two or more different regular polygons to fill the plane. Can you find all the semi-regular tessellations?
A huge wheel is rolling past your window. What do you see?
Which hexagons tessellate?