Nick Lord says "This problem encapsulates for me the best features of the NRICH collection."
Using the interactivity, can you make a regular hexagon from yellow triangles the same size as a regular hexagon made from green triangles ?
Can you find a general rule for finding the areas of equilateral triangles drawn on an isometric grid?
If the yellow equilateral triangle is taken as the unit for area, what size is the hole ?
Using LOGO, can you construct elegant procedures that will draw this family of 'floor coverings'?
Which of these triangular jigsaws are impossible to finish?
Recreating the designs in this challenge requires you to break a problem down into manageable chunks and use the relationships between triangles and hexagons. An exercise in detail and elegance.