By following the clear instructions in this book, the young mathematician can quickly learn to fold an accurate model of a right angle. With this he can test angles in the room around him to see if they are right, smaller than right, or larger than right. By folding a series of right angles on one sheet paper, the reader can make a rectangle and then go on to fold the special kind of rectangle called a square. Having mastered the skill of folding right angles and rectangles, he can explore and discover the meaning of more technical—mathematical words, such as congruent and similar.

All anyone needs to have fun with this book is a pair of scissors, a pencil, and a lot of paper. Some of the paper must be clean, but most of it can be newspaper or have lines on it.

Giulio Maestro's energetic, colorful illustrations show agile pandas folding geometric shapes on their own and setting a good example for the reader.

From the dust jacket of Shadow Geometry