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

Modern Puzzles by Henry Ernest Dudeney: $122$

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?

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

Sources

• 1926: Henry Ernest Dudeney: Modern Puzzles ... (previous) ... (next): Geometrical Problems: Paper-Folding Puzzles: $122$. -- Folding a Pentagon
• 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Geometrical Problems: Paper Folding Puzzles: $362$. Folding a Pentagon