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Convergence articles

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Classrom suggestions for integrating Leonardo's ideas in several different classes
Two men starting from the same point begin walking in different directions. Their rates of travel are in the ratio 7:3.
Having been given the perimeter and perpendicular of a right angled triangle, it is required to find the triangle.
The incircle O(r) of triangle ABC touches AB at D, BC at E and AC at F. Find r in terms of AD, BE and CF.

A survey of over two thousand years of the history of mathematics on the Indian subcontinent.
The quadrennial meeting of the International Study Group on the Relations between History and Pedagogy of Mathematics will be in Mexico City, July 14-18, 2008.
A translation of one of the seminal papers in the field of elliptic integrals, but one that can be read by an undergraduate.
A cliff with a tower on its edge is observed from a boat at sea; find the height of the cliff and the tower.
Two circles of radii 25 feet intersect so that the distance between their centers is 30 feet. What is the length of the side of the largest square inscribable within their intersecting arcs?
Suppose a ladder 60 feet long is placed in a street so as to reach a window 37 feet above the ground on one side of the street...