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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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## Elementary Geometry: With Applications in Mensuration

Charles Davies - 1850 - 216 páginas
...triangle ACB. 14 BOOK I. Definitions. 48. There are several kinds of quadrilaterals. First. The square, which has all its sides equal, and all its angles right angles. Second. The rectangle, the opposite sides of which are parallel and its angles right angles. Third....
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## ELEMENTARY GEOMETRY, WITH APPLICATIONS IN MENSURATION.

CHARLES DAVIS, L.L. D. - 1850
...altitude of BOOK I . Definitions. 48. There are several kinds of quadrilaterals. First. The square, which has all its sides equal, and all its angles right angles. Second. The rectangle, the opposite sides of which are parallel and its angles right angles. Third....
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## The first two books of the Elements of Euclid, with additional figures ...

Euclides - 1852
...triangle. Fig. 3. is an equilateral acute angled triangle.] XXX. Of four,sided figures, a square is that which has all its sides equal, and all its angles right angles. XXXI. 1 An oblong is that which has all its angles right angles, but has not all its sides equal. XXXII....
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## The Elements of Euclid, books i-vi; xi. 1-21; xii. 1,2; ed. by H.J. Hose

Euclides - 1853
...triangle each of the three angles of which is an acute angle. XXX. A square is defined to be a four- sided figure which has all its sides equal and all its angles right angles. XXXI. An oblong is a four- sided figure which has all its angles right angles, but has not all its...
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## The Elements of Euclid: With Many Additional Propositions ..., Parte1

Euclid - 1853 - 136 páginas
...under those tw<f lines; thus the rectangle ABCD would be termed the rectangle under AB and BC. 28. A SQUARE is a quadrilateral figure which has all its sides equal, and two sides of which form a right angle. SCHOLIUM. As a square is contained by four equal lines, upon...
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## The first six books of the Elements of Euclid, with numerous exercises

Euclides - 1853 - 147 páginas
...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. Square. Oblong. XXXI. An oblong is that which has all its angles right angles, but has not all its...
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## The synoptical Euclid; being the first four books of Euclid's Elements of ...

Euclides - 1853
...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....
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## The geometry, by T. S. Davies. Conic sections, by Stephen Fenwick

...acute-angled triangle is that which has three acute angles. 30. Of four-sided figures, a square is that which has all its sides equal, and all its angles right angles. 31. An oblong is that which has all its angles right angles, but has not all its sides equal. 32. A...
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## Orr's Circle of the Sciences: The mathematical sciences

William Somerville Orr - 1854
...triangle has each of its angles acute, or less than a right angle. Of four-sided figures, a square is that which has all its sides equal, and all its angles right angles. If the four sides are equal, and only one of the angles affirmed to be right, the other three angles...
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## Elements of geometry and mensuration

Thomas Lund - 1854 - 362 páginas
...notions and principles. For example, in the former Part a square was defined to be "a parallelogram, which has all its sides equal and all its angles right angles"; in this Part such a construction is required to be actually made under certain given circumstances....
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