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Convergence articles

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Three congruent circles of radius 6 inches are mutually tangent to one another. Compute the area enclosed between them.
This is a page from a manuscript of the Algebra (Maqalah fi al-jabra wa-al muqabalah) of Omar Khayyam (1048-1131). This work is known for its solution of the various cases of the cubic equation by finding the intersections of appropriately chosen conic sections.

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.

This meeting will take place at the MAA Carriage House in Washington, DC on April 19, 2008.
Explain the geometric basis of "completing the square," the original method of solving quadratic equations, to your students.
A wooden log is encased in a wall. If we cut part of the wall away to a depth of 1 inch...
Mathematics is often referred to today as the "science of patterns." But has this always been true historically, or is this something that happened in recent times? The question is discussed here with reference to the work of Euclid and Jacob Steiner.
Image of first arithmetic book published in the English colonies in what is now the Eastern United States
A horse, halving its speed each day, travels 700 miles in 7 days. How far does it travel each day?
A collection of illustrations of Inca quipus, with references to their earliest descriptions.