# Convergence articles

Displaying 511 - 520 of 664

A man bought a number of sheep for $225; 10 of them having died, he sold 4/5 of the remainder for the same cost and received$150 for them. How many did he buy?
A brief introduction to the life of John Napier, along with an animation of calculations using Napier's bones.
Two travelers, starting at the same time from the same point, travel in opposite directions round a circular railway.
A delightful survey of the history of trigonometry, along with discussions of its uses, both ancient and modern.
Historical Problems can be used to enliven any mathematics class. Here are some examples from medieval times, from a 19th century American textbook, and from a 19th century Armenian textbook, among other sources.
I have two fields of grain. From the first field I harvest 2/3 a bushel of grain/unit area; from the second, 1/2 bushel/unit area.
A description of a Research Experience for Undergraduates conducted in 2007 at Hood College.
Show that the curves x2 - y2 = a2 and 2 xy = b2 cross at right angles.
How does geometry begin? This work explores the origins of geometry in the work of artisans.
A study of Victorian idealism and its relation to religion, as exemplified in the work of three 19th century British mathematicians.