Henry Ernest Dudeney/Puzzles and Curious Problems/222 - Folding a Pentagon

by : $222$

 * Folding a Pentagon
 * Given a ribbon of paper, as in the diagram, of any length -- say more than $4$ times as long as broad --
 * it can all be folded into a perfect pentagon,
 * with every part lying within the boundaries of the figure.


 * Dudeney-Puzzles-and-Curious-Problems-222.png


 * The only condition is that the angle $ABC$ must be the correct angle of two contiguous sides of a regular pentagon.


 * How are you to fold it?