Cushion: The Other Two Sides
Haven’t you always wanted to prove Pythagoras’ Theorem with a cushion? Now you can.
One side shows ‘the square on the hypotenuse’; on the other side the triangles are re-arranged to show ‘the squares on the other two sides’.
Buy the using the link at the top of this page
or 12 Pillows of Wisdom (a PDF book of 12 cushion patterns)