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A description of this well-regarded website.

Having been given the lengths, a and b, of two straight lines drawn from the acute angles of a right triangle to the middle of the opposite sides, determine the lengths of those sides.

Our reviewer praises the selection of excerpts, the use of facsimiles rather than transcriptions, and the commentary and English translation in this collection.

Explain the geometric basis of "completing the square," the original method of solving quadratic equations, to your students.
The Arithmetic of Boethius (480-524) dates from the early sixth century. This page is from a mansucript (Plimpton MS 165) that dates from approximately 1294, written on vellum.
This a wonderfully written tour of aspects of classical geometry-- a must read for all geometry teachers.
A survey of this theorem's 4000 year history, with applications to many fields.
Brief biographies of mathematicians with mathematical activities based on their work.
An excellent book surveying the history of the philosophy of mathematics from the time of Plato to the nineteenth and early twentieth centuries.
NCTM Annual Meeting in St. Louis

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