This a wonderfully written tour of aspects of classical geometry-- a must read for all geometry teachers.

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Brief biographies of mathematicians with mathematical activities based on their work.

Curve sketching, tangent lines, and optimization, explored via interactive applets

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.

A bibliographical reference to mathematics books printed in the new world before 1700.

A discussion of the meaning of mathematical unsolvability in the context of the history of Abel's proof of the unsolvability of the quintic equation in terms of radicals.

Explain the geometric basis of "completing the square," the original method of solving quadratic equations, to your students.

A translation of and commentary on Frans van Schooten's work on constructions using only a straightedge. Van Schooten's postulates for use of the straightedge, however, allow the copying of one line segment onto another.

A collection of articles on mathematics in Europe from the twelfth to the fifteenth century.