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Convergence articles

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A description of this well-regarded website.

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.

Explain the geometric basis of "completing the square," the original method of solving quadratic equations, to your students.
Poster of Banneker, with a brief description of his life and work.
Greek ladders for approximating square roots may be more ancient than the ancient Greeks. Students at any level can appreciate their beauty and simplicity. Those who have studied calculus can compare them with Newton's Method for approximating roots.

As is the case with a great deal of interesting mathematics, the conic sections are believed to have been discovered in an attempt to solve a problem, a problem which on the surface seems to have nothing to do with conic sections.

A collection of articles on mathematics in Europe from the twelfth to the fifteenth century.
In many sources, we see that Tartaglia has the surname Fontana. According to the author of this article, the co-discoverer of the cubic formula did not ever use that name.
A wonderful book about the square root of 2, beginning with the search for the side of a square double a given square.
A collection of articles about historical and contemporary women in mathematics.