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

by : $222$

 * Folding a Pentagon

Solution

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

By folding $A$ over, find $C$, so that $BC = AB$.

Then fold as in Figure $1$ across the point $A$.

This will give point $D$.

Fold as in Figure $2$, making the edge of the ribbon lie along $AB$.

This will give point $E$.

Continue the fold as in Figure $3$, and so on, until all the ribbon lies in the pentagon.

Also see

 * Henry Ernest Dudeney: Modern Puzzles $120$ - The Ribbon Pentagon