Book Description A colorful square, dissected into four parts, with hinges marked in black If you leave the blue piece fixed and swing the others around their hinges, a new shape will emerge Can you guess just by looking what it will be? This is just one of the tricky geometrical gems that will make a puzzler’s mind work overtime Try drawing a set of ожшла variously shaped polygons using only a compass and a ruler (no measuring allowed!), figuring out which of two sculptures is bigger (logic alonewon’t give you the answer), and lots more.  Sylvani2004 г 128 стр ISBN 1402716664.