Use a ruler and pen to join the dots – you now have a regular hexagon. Image caption ... to the dot – you now have a regular equilateral triangle.

He had folded the strip diagonally at three places and joined the ends so that it made a hexagon [see illustration below]. When he pinched two adjacent triangles together and pushed the opposite ...

The honeycomb is a marvel of mathematics and animal architecture. It is unclear if bees are using the advantages of physics ...