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On Triangles, by Regiomontanus (Johannes M�ller) (1436-1476), written in 1464 but not published until 1533.
Find the isoceles triangle of smallest area that circumscribes a circle of radius 1.
On an expedition to seize his enemy's elephants, a king marched 2 yojanas the first day.
A man hired a horse in London at 3 pence a mile. He rode 94 miles due West to Bristol then due north to Chester, whence he returned toward London for 66 miles, which put him in Coventry.
A number is required; that the square shall be equal to twice the cube.
A five-volume set of biographies of mathematicians from ancient times to the twentieth century, aimed at secondary students.
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.
Fibonacci gave a practical rule for approximating the area of an equilateral triangle.
The third part of a necklace of pearls, broken in a lover's quarrel, fell to the ground...

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