Henry Ernest Dudeney/Modern Puzzles/122 - Folding a Pentagon

by : $122$

 * Folding a Pentagon
 * Here is another puzzle in paper folding of a rather more difficult character than the hexagon example that we have considered.


 * If you are given a perfectly square piece of paper,
 * how are you going to fold it so as to indicate by creases a regular pentagon,
 * all ready to be cut out?


 * Dudeney-Modern-Puzzles-122.png


 * Remember that you must use your fingers only, without any instrument or measure whatever.