THE CRESCENT PUZZLE

Here is an easy geometrical puzzle. The crescent is formed by two circles, and C is the centre 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?

Geometry -> Plane Geometry -> Circles Algebra -> Equations

Sources:

Amusements in Mathematics, Henry Ernest Dudeney Question 191

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