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Convergence articles

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There is a right triangle where: the sum of the upright multiplied by itself twice and the hypotenuse multiplied by itself is 700 units; and, the sum of the base multiplied by itself twice and the hypotenuse multiplied by itself is 900 units.
Four episodes in the history of geometry are discussed, where dynamic geometry helps in understanding the ideas.
A gallery of episodes from the history of calculus.
A horse halving its speed every day runs 700 miles in 7 days.

The author shows how teachers can use Leonhard Euler's original works in the classroom to explore Euler's famous polyhedral formula,
V + F = E + 2.

A dramatization, in two Acts, of the struggles of European mathematicians of the seventeenth and eighteenth centuries to come to terms with the newly admitted negative numbers.
A horse, halving its speed each day, travels 700 miles in 7 days. How far does it travel each day?
This website devoted to miscellanea about Archimedes contains much interesting material about his life and times.
A collection of articles dealing with mathematical models and objects and how they can be used in teaching.
A survey of the attempts to prove Kepler's conjecture over the past 400 years.

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