# Convergence articles

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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.
Given a pendulum as shown. The height of the pendulum is two units and its horizontal width is 2 units. What is the area of the pendulum?
Two circles, the sum of whose radii is a, are placed in the same plane with their centers at a distance 2a...
What is the perpendicular height of a cloud when its angles of elevation were 35 degrees and 64 degrees as taken by two observers at the same time...
The two final volumes of the MAA tercentenary series on Euler present numerous papers on various aspects of Euler's life and work.
Assume that the human population after the flood was 6 and that 200 years later the population was 1,000,000. Find the annual growth of the population.
An introduction to the priority dispute between Euler and D'Alembert relating to several mathematical ideas that both worked on in the 1740s and 1750s.
2007 marks the three hundredth anniversary of the birth of Leonhard Euler, the most prolific mathematician of all time. There are numerous events throughout the world celebrating this anniversary, many of which are listed here.

How Euler resolved the paradox first noted by Maclaurin that nine points should determine a curve of order three, yet two such curves can intersect in nine points

Page from al-Khwarizmi's algebra text written in about 825. The proof of the rule for solving a quadratic equation of the form "squares plus roots equal numbers".