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There is a circle from within which a square is cut, the remaining portion having an area of 47.6255 square units.
There are a number of wonderful mathematics websites that readers of Convergence should be aware of. We describe some of them here.

Images of the first printed edition of Euclid's Elements

A discussion of why we use "e" to represent the base of the natural logarithm system.
Historical Problems can be used to enliven any mathematics class. Here are some examples from medieval times, from a 19th century American textbook, and from a 19th century Armenian textbook, among other sources.
Suppose the area of an equilateral triangle be 600. The sides are required.
What is the value of X...
I have two fields of grain. From the first field I harvest 2/3 a bushel of grain/unit area; from the second, 1/2 bushel/unit area.
A biography of the geometer Donald Coxeter.
It is required to determine whether 30 horses can be put into 7 stalls; so that in every stall there may be, either a single horse, or an odd number of horses.