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" A rhombus is that which has all its sides equal, but its angles are not right angles. "
The First Six Books with Notes - Página 3
por Euclid - 1822 - 179 páginas
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The Elements of Euclid: The Errors by which Theon, Or Others, Have Long ...

Robert Simson - 1827 - 513 páginas
...angled triangle, is that which has three acute angles. xxx. Of four-sided figures, a square is that which has all its sides equal, and all its angles right angles. XXXI. An oblong is that which has all its angles right angles, but has not all its sides equal. XXXII....
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Elements of Mental Philosophy, Volumen2

Thomas Cogswell Upham - 1831
...or brought out by a successive comparison of propositions. We say, for instance, that a square is a figure, which has all its sides equal, and all its angles right angles. In this definition, there is not only involved'equality of bides, but equality of angles. And it is...
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The first six books of the Elements of Euclid: with notes

Euclid, Thomas Elrington - 1833 - 183 páginas
...lines. 30. A parallelogram is a quadrilateral figure, whose Fig. 1 '. opposite sides are parallel. 81. A square is a quadrilateral figure, which has all...than four sides, are called polygons. POSTULATES, Let it be granted, 1. That a right line may be drawn from any one point to any other. 2. That a terminated...
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Inductive Geometry, Or, An Analysis of the Relations of Form and Magnitude ...

Charles Bonnycastle - 1834 - 631 páginas
...equal, the fourth side will be equal to either of the others. A quadrilateral of this kind, namely, which has all its sides equal, and all its angles right angles, is called a square. Part I. art. 13. 69. 5. As these lines M and N appear, from the last remark, to...
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The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid - 1835 - 513 páginas
...angled triangle is that which has three acute angles. XXX. Of four sided figures, a square is that which has all its sides equal, and all its angles right angles. XXXI. An oblong is that which has all its angles right angles, but has not all its sides equal. XXXII....
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A System of Popular Geometry: Containing in a Few Lessons So Much of the ...

George Darley - 1836 - 128 páginas
...also one or both of the sides AD, CD. NOTE N. The common definition of a square is—" a four-sided figure, which has all its sides equal, and all its angles right angles." But this definition is in part superfluous; for if but one of the angles be a right angle, it will...
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The Teacher's Assistant in the "Course of Mathematics Adapted to the Method ...

1836 - 472 páginas
...angled triangle, is that which has three acute angles. 25. Of four sided figures, a square is that which has all its sides equal, and all its angles right angles. 26. An oblong, is that which has all its angles right angles, but has not all its sides equal. 27....
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The First Six and the Eleventh and Twelfth Books of Euclid's Elements: With ...

Euclid - 1837 - 390 páginas
...definitions of the square and rhombus which are given in Simeon's edition : " A square is a four-sided figure which has all its sides equal, and all its angles right angles. " A rhombus is a four-sided figure which has all its sides equal ; but its angles are not right angles."...
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Elements of Plane Geometry According to Euclid

Andrew Bell - 1837 - 240 páginas
...obtuse-angled triangle is that which has an obtuse angle. _____ 29. Of four-sided figures, a square is that which has all its sides equal, and all its angles right angles. 30. An oblong or rectangle is that which has all its angles right angles, but has not all its sides...
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Euclid's Elements [book 1-6] with corrections, by J.R. Young

Euclides - 1838
...an obtuse angle, . - \ al, its angles must be acute. XXVI. Of four-sided figures, a square is that which has all its sides equal, and all its angles right angles. This definition has been long known to be objectionable on the ground of its redundancy. More is said...
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