A song for Pi Day.

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A song for Pi Day.

Prove geometrically that the hypocycloid is a straight line when the radius of the rolling circle is one-half the radius of the fixed circle.

Fibonacci gave a practical rule for approximating the area of an equilateral triangle.

Given the frustum of a circular cone with height h.

Thumbnail sketches of statisticians throughout history.

NCTM Annual Meeting in St. Louis

A bibliographical reference to mathematics books printed in the new world before 1700.

In this article which won the 2005 prize of HOMSIGMAA, the author discusses Eratosthenes' argument to determine the size of the earth as well as possibilities for the size which Eratosthenes found (in modern measures).

A biography stressing Agnesi's deep commitment to help those in need.

The Fundamental Theorem of Calculus is presented in the version of Scottish mathematician James Gregory -- without the use of limits.