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Convergence articles

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If in a circle ABDC, circumscribe an equilateral triangle ABC; the straight line AD is equal to the sum of the two straight lines BD and DC: required a demonstration.
Original source material from seventeen mathematicians, with commentary by Stephen Hawking.
A superb collection of articles by experts on various areas of the history of analysis, from the Greeks to modern times.
Where does pi come from? Why should we be interested in negative numbers, or square roots of negative numbers? How did people ever figure out the quadratic formula? A truly wonderful reference for teachers at all levels.
This is the page illustrating the construction of an ellipse, from the Latin translation (1538) of the Treatise on Mensuration of Albrecht D�rer (1471-1528). This book was originally written in German and published in 1525 and was designed to teach German artists the geometrical ideas on which perspective in painting was based.
Given four integers where if added together three at a time their sums are: 20, 22, 24, and 27. What are the integers?
This meeting will take place at the MAA Carriage House in Washington, DC on April 19, 2008.
A square circumscribed about a given circle is double in area to a square inscribed in the same circle. True of false? Prove your answer.
A wooden log is encased in a wall. If we cut part of the wall away to a depth of 1 inch...