In the applet below is a shape that tessellates the plane. That is to say, multiple copies of the shape--when rotated and pieced together--will fill the entire plane as far as you like in any direction.[br][br]This particular shape was created using M.C. Escher's "Hexagon Tessellation Trick". [br][br]Drag any of the red dots to explore M.C. Escher's "Hexagon Tessellation Trick." Different dots do different things. As you move the red dots, ask yourself:[br][br]What do you think is M.C. Escher's "Hexagon Tessellation Trick" for creating tessellating shapes?