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Convergence articles

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A ladder is placed perpendicular to the plane of the horizon, and in coincidence with the plane of an upright wall.
A teacher agreed to teach 9 months for $562.50 and his board. At the end of the term, on account of two months absence caused by sickness, he received only $409.50. What was his board worth per month?

Here are all articles, classroom activities, and reviews arranged into annual volumes starting with 2004.

Seven men held equal shares in a grinding stone 5 feet in diameter. What part of the diameter should each grind away?

A survey of the mathematics education of cadets in the first century after the founding of the U.S. Military Academy.

Given a rectangle, find the line through one vertex of minimum length that passes through the extensions of the two opposite sides.
In a circle whose circumference is 60 units, a chord is drawn forming a segment whose sagitta is 2 units. What is the length of the chord?
A two door gate of unknown width is opened so that a 2 inch gap exists between the two doors.
In a right triangle, the hypotenuse is 9.434 and the sum of the sides around the right angle is 13. Find the lengths of the sides around the right angle.
The movie Agora, about the mathematician Hypatia of Alexandria (c. 400 AD), is spectacular and intriguing but Hypatia should be portrayed as the hero she was.