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Convergence articles

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A man, woman, and two boys desire to cross a river, but their boat has weight restrictions!

Three equal circumferences with radii 6" are tangent to each other. Compute the area enclosed between them.
This is the page illustrating the construction of an ellipse, from the Latin translation (1538) of the Treatise on Mensuration of Albrecht D�rer (1471-1528). This book was originally written in German and published in 1525 and was designed to teach German artists the geometrical ideas on which perspective in painting was based.
A letter to Sam Greitzer, late editor of Arbelos, discussing the derivation of two formulas for calculating pi.
A great book from which to learn and teach the subject of relativity.
A railway train strikes a snowdrift which creates a constant resistance. How long does it take the snow to stop the train?
Three vertical posts along a straight canal, each rising to the same height above the surface of the water. By looking at the line of vision, determine, to the nearest mile, the radius of the earth.
Heron of Alexandria (ca 200) wrote on many aspects of applied mathematics.
There were two men, of whom the first had 3 small loaves of bread and the other, 2.