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Convergence articles

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Prove geometrically that the hypocycloid is a straight line when the radius of the rolling circle is one-half the radius of the fixed circle.
Given the frustum of a circular cone with height h.
The "rood", a linear measure dating from many centuries ago, is calculated anew in today's classrooms.
A study and English translation of Servois' attempt to place calculus on a foundation of algebraic analysis without recourse to infinitesimals, continuing the work of Lagrange.
Problems taken from Chinese sources
One says that 10 is divided into three parts and if the small part is multiplied by itself and added to the middle one multiplied by itself the result is the large one multiplied by itself...
A survey of early theories of planetary motion, with dynamic figures to help in understanding these motions.
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.
A biography stressing Agnesi's deep commitment to help those in need.
There is a mound of earth in the shape of a frustum of a cone.

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