Having been given the lengths, a and b, of two straight lines drawn from the acute angles of a right triangle to the middle of the opposite sides, determine the lengths of those sides.

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Explain the geometric basis of "completing the square," the original method of solving quadratic equations, to your students.

A survey of this theorem's 4000 year history, with applications to many fields.

An excellent book surveying the history of the philosophy of mathematics from the time of Plato to the nineteenth and early twentieth centuries.

In his analysis of volumes of wine barrels, Kepler used ideas that would become important in differential and integral calculus. Use this article's animated visual imagery to help share Kepler's ideas with your students.

A collection of 24 mini-posters, each containing a quotation about mathematics.

There are four winners of the HOMSIGMAA Student Paper Contest for 2008. The papers may be accessed here.

A wonderful book about the square root of 2, beginning with the search for the side of a square double a given square.

Three congruent circles of radius 6 inches are mutually tangent to one another. Compute the area enclosed between them.

A collection of articles about historical and contemporary women in mathematics.