Problem: The Crescent Puzzle


Here is an easy geometrical puzzle. The crescent is formed by two circles, and $C$ is the center of the larger circle The width of the crescent between $B$ and $D$ is $9$ inches and between $E$ and $F$ $5$ inches. What are the diameters of the two circles?

Solutions: 1

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Project Gutenberg

  1. Dudeney, H. E.: "Amusements in Mathematics", The Authors' Club, 1917

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