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The elements of Euclid : viz, the first six books, together with the eleventh and twelfth : the errors, by which Theon, or others, have long ago vitiated these books, are corrected, and some of Euclid's demonstrations are restored : also, The book of Euclid's data, in like manner corrected (1834)

Euclid, Euclid, Simson, Robert, 1687-1768 · Philadelphia : Desilver & Thomas · leaf 11

An illustration from The elements of Euclid : viz, the first six books, together with the eleventh and twelfth : the errors, by which Theon, or others, have long ago vitiated these books, are corrected, and some of Euclid's demonstrations are restored : also, The book of Euclid's data, in like manner corrected, 1834, leaf 11
other is calleda perpendicular to it. XI. An obtuse angle is that which is greater than a right angle. XII.An acute angle is that which is less than a right angle. XIII.A term or boundary is the extremity of any thing. XIV.A figure is that which is enclosed by one or more boundaries. XV. A circle… … ROOK I. THE ELEMENTS OF EUCLID. XVI. And this point is called the centre of the circle. XVII. A diameter of a circle is a straight line drawn through the centre,and terminated both ways by the circumference. XVIII. A semicircle is the figure contained by a diameter and the partof the circumference…

Mathematics, Greek · Geometry · Trigonometry

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