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Convergence articles

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How high above the earth must a person be raised that he [or she] may see 1/3 of its surface?

Three images from Kepler's 1609 Astronomia Nova, the text in which he introduced his first two laws of planetary motion

Prove that the area of a regular polygon can be given by the product of its perimeter and half the radius of the inscribed circle.
Determine the dimensions of the least isosceles triangle ACD that can circumscribe a given circle.
A collection of biographies of sixty mathematicians from the eighteenth century to the twentieth.
Circular Images
Two men brought their fish through customs. Find how much the fish cost, and what is the customs fee.
Having been given the perimeter and perpendicular of a right angled triangle, it is required to find the triangle.
This conference takes place in 2006 at Pennsylvania State University, Erie.
The author compares Greek ladder, continued fraction, and Newton's Method approximations, noting that the Greek ladder easily gives both of Archimedes' famous bounds.

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