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Given the dimensions of an isosceles trapezoid find the length of the transversal drawn parallel to the bases that divides the trapezoid into 2 equal areas.
We sadly announce the untimely death of one of Convergence's editorial board members.
This is the title page of the Siderius Nuncius (Starry Messenger) of Galileo (1564-1642), published in 1610. This book was a report on Galileo's first investigations with a telescope. Also includes Galileo's initial sketches of the surface of the moon.
A lively history of number systems and number theory from earliest times up to the notion of "infinity".
A man died leaving 3 sons, to whom he bequeathed his estate in the following manner: to the eldest he gave 184 dollars; to the second 155 dollars and to the third 96 dollars;
A survey of this theorem's 4000 year history, with applications to many fields.
An excellent book surveying the history of the philosophy of mathematics from the time of Plato to the nineteenth and early twentieth centuries.

The copybooks of two young men reveal very different purposes in learning geometry.

The symposium this year will discuss Gauss's Disquisitiones Arithmeticae.