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 (Google eBook)

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Desilver, 1829 - Geometry - 516 pages
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Page 13 - Let it be granted that a straight line may be drawn from any one point to any other point.
Page 85 - The angles in the same segment of a circle are equal to one another.
Page 331 - Equiangular parallelograms have to one another the ratio which is compounded of the ratios of their sides.
Page 37 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Page 53 - If a straight line be divided into any two parts, the rectangle contained by the whole and one of the parts, is equal to the rectangle contained by the two parts, together with the square of the aforesaid part.
Page 100 - If from any point without a circle two straight lines be drawn, one of which cuts the circle, and the other touches it ; the rectangle contained by the whole line which cuts the circle, and the part of it without the circle, shall be equal to the square of the line which touches it.
Page 163 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Page 26 - ANY two angles of a triangle are together less than two right angles.
Page 29 - Let A, B, C be the three given straight lines, of which any two whatever are greater than the third, viz.
Page 28 - Any two sides of a triangle are together greater than the third side.

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