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Topic: Quadrature of the circle

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	Archimedes - Wikipedia, the free encyclopedia
		Archimedes was killed by a Roman soldier during the sack of Syracuse during the Second Punic War, despite orders from the Roman general Marcellus that he was not to be harmed.
		He proved that the ratio of a circle's circumference to its diameter is the same as the ratio of the circle's area to the square of the radius.
		Archimedes' On The Measurement Of The Circle Translated by Thomas Heath.
	en.wikipedia.org /wiki/Archimedes (2256 words)

	The Galileo Project \| Library \| Glossary
		armillary sphere: An instrument consisting of an arrangement of rings, all of which are circles of the same sphere, used to show the relative positions of the celestial equator, ecliptic, and other circles of the clestial sphere.
		ecliptic: The great circle formed by the intersection of the plane of the earth's orbit with the celestial sphere, or the apparent annual path of the sun in the heavens.
		quadrature: Those points or moments at which a half moon is visible.
	galileo.rice.edu /lib/glossary.html (1678 words)

	Microwave Slang - Microwave Encyclopedia - Microwaves101.com
		Hybrid couplers come in two types, 90 degree or quadrature hybrids, which include branchline couplers, Lange couplers, and overlay couplers and short-slot waveguide couplers.
		The second type of hybrid is the 180 degree hybrid, which includes the rat-race and the magic tee.
		Similar to "trap", a word used in system circles to describe many unknown phased array antenna phenomena as in "that suck out in the antenna pattern must be due to an unintended surface wave".
	www.microwaves101.com /encyclopedia/slang.cfm (6161 words)

	Encyclopedia Obscura: Pooh and the Ancient Mysteries
		Somehow, these spheres also manage to be the circles of hell from The Divine Comedy.
		Apparently, Christopher's boots are his armour, and the table around which the party is held later is the round table.
		The fact that the table is nowhere near round, is explained through Eliphas Levi's claim that a great wizard will be able to solve the quadrature of a circle.
	www.encyclopedia-obscura.com /bookspooh.html (2184 words)

	Leonardo da Vinci: Timeline of Mathematical Work
		Studies Euclid; begins a period of intense mathematical study from 1496-1504
		Begins the quadrature problems (squaring the circle); uses key geometrical figure
		Determines the surface area of a cone by rolling one on a plastic surface
	www.hypatiamaze.org /leonardo/leo_timlin.html (410 words)

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