| 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.... | |
| 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.... | |
| 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.... | |
| 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... | |
| 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... | |
| 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... | |
| 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.... | |
| 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... | |
| 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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