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Given a right triangle where you know the length of the base and the sum of the perpendicular side and the hypotenuse.

Two men brought their fish through customs. Find how much the fish cost, and what is the customs fee.
A survey of concepts of infinite sets over the centuries.
This conference takes place in 2006 at Pennsylvania State University, Erie.
Find the height of a window.
This is the title page of the 1640 printing of Galileo's Operation of the Geometrical and Military Compass, originally published privately in 1606. Galileo had invented a version of this geometrical compass a few years earlier and evidently gave copies of this manual to those who bought the compass. The compass had many uses, from performing square root calculations to determining ranges of cannons to solving surveying problems.
Two posters illustrating the major milestones in the history of mathematics, from the first ideas of "number" to the proof of Fermat's Last Theorem.
A certain slave fled from Milan to Naples going 1/10 of the whole journey each day. At the beginning of the third day, his master sent a slave after him and this slave went 1/7 of the whole journey each day.