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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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Elements of Mental Philosophy: Embracing the Two Departments of ..., Volumen1

Thomas Cogswell Upham - 1839
...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 sides, but equality of angles. And it is...
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First (Second) book of drawing (by J. Clark).

John Clark (drawing master.) - 1840
...one line cross another ; where they touch is the point of intersection. The Square — A square is a figure which has all its sides equal, and all its angles right angles. The drawing of this figure requires the base line to be given, D on which points A and B, perpendiculars,...
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First Lessons in Geometry: With Practical Applications in Mensuration, and ...

Charles Davies - 1840 - 252 páginas
...altitude. Thus, AC is the altitude. 14. There are several kinds of quadrilaterals. First. — The square, which has all its sides equal, and all its angles right angles. Of Plane Figures. Second. — The rectangle, which has its angles right angles, and its opposite sides...
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Elements of Mental Philosophy Enbracing the Two Departments of the ..., Volumen1

Thomas Cogswell Upham - 1841
...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 sides, but equality of angles. And it is...
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The Elements of Euclid; viz. the first six books,together with the eleventh ...

Euclides - 1841 - 351 páginas
...triangle is that which .^ has an obtuse angle. — / XXIX. XXX. Of four-sided figures, a square is that which has all its sides equal, and all its angles right angles. XXXI. An oblong, or rectangle, is that which has all its angles right angles, but has not all its sides...
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Elements of geometry: consisting of the first four,and the sixth, books of ...

Euclides - 1842
...acute-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 Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1842 - 317 páginas
...acute angled triangle is that whick 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. A...
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A course of practical geometry for mechanics

William Pease - 1843 - 68 páginas
...angle. The two remaining angles will necessarily be acute. 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. Its...
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Lectures on the Principles of Demonstrative Mathematics

Philip Kelland - 1843 - 147 páginas
...bent. 4. Euclid's definition of a square violates this canon. " Of four-sided figures, a square is that which has all its sides equal, and all its angles right angles." Not only is there a superfluity in this expression, " all its angles right angles," but it is a superfluity...
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The first six and the eleventh and twelfth books of Euclid's Elements; with ...

James Thomson - 1845 - 358 páginas
...supplementary. So also are two angles which are together equal to two right angles. -, A square is a four-sided figure which has all its sides equal and all its angles right angles. " A rhombns is a four-sided figure which has all its sides equal ; but its angles are not right angles."...
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