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Convergence articles

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In a certain lake, swarming with red geese, the tip of a lotus bud was seen to extend a span [9 inches] above the surface of the water.
Explain the geometric basis of "completing the square," the original method of solving quadratic equations, to your students.

Convergence Advisory Board 2004-2009

In this fascinating and accessible book, the author devotes one lively, informative page of description and one striking, full-page illustration to each of 250 milestones in mathematics.
A method for extracting square roots used in Italy through the 18th century was introduced in a manuscript by the 12th century mathematician al-Hassar. Appendix: When Was Fermat Born? (Not in 1601 ...)
Given the cats eye as shown. Let the radius of the eye be given by R. What is the area of the pupil?
NCTM Annual Meeting in St. Louis
There is a garden is the shape of a rhombus whose side is 768.52 feet. Within the garden is an inscribed square flower bed whose side is 396 feet. What is the area of the garden?
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 collection of biographies of sixty mathematicians from the eighteenth century to the twentieth.