The Monthly publishes articles, as well as notes and other features, about mathematics and the profession. Its readers span a broad spectrum of mathematical interests, and include professional ...

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What the heck is so regular about a regular polygon? Above is a regular nonagon inscribed within a circle. The shaded region has an area of 2874.296608 square meters. Find circumference C of the ...

Around 250 B.C., the Greek mathematician Archimedes calculated the ratio of a circle's circumference to its diameter. A precise determination of pi, as we know this ratio today, had long been of ...