Follow the diagrams to make this patchwork piece, based on an
octagon in a square.
Generate three random numbers to determine the side lengths of a triangle. What triangles can you draw?
Here is a chance to create some attractive images by rotating
shapes through multiples of 90 degrees, or 30 degrees, or 72
Can you explain why it is impossible to construct this triangle?
What is the total area of the first two triangles as a fraction of
the original A4 rectangle? What is the total area of the first
three triangles as a fraction of the original A4 rectangle? If. . . .