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" ... that the angle inscribed in a semicircle is a right angle, and to have testified his joy by a sacrifice to the Muses! "
First Lessons in Geometry: Upon the Model of Colburn's First Lessons in ... - Page 21
by Alpheus Crosby - 1847 - 164 pages
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An Essay Upon the Study of Geometry in Common Schools

Stephen Chase - Geometry - 1847 - 28 pages
...priests. We next find it in Greece, among the philosophers and learned men ; — cultivated by Thaïes, Pythagoras, Plato, and their schools, and by Euclid,...geometrical knowledge ; the former, who lived about 550 В. С., being understood to have discovered that elegant proposition, which still bears his name,...
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The R.I. Schoolmaster, Volume 3

Education - 1858 - 402 pages
...and at Luxor, for to Pythagoras himself is due the honor of discovering the fundamental propositions that the angle inscribed in a semi-circle is a right angle, and that the square of the hypothenuse in a right angle triangle is equal to the sum of the squares of...
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Silencing the Demon’s Advocate: The Strategy of Descartes’ <I>Meditations</I>

Philosophy - 2008 - 209 pages
...Arnauld raises an objection of this sort in Objections IV. Having imagined a person who is certain that the angle inscribed in a semicircle is a right angle (and therefore that the triangle formed by this angle and the circle's diameter is a right triangle), he...
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