| 1854 - 1110 pages
...manifest that this in any rectilineal figure is equal to the number of sides. Def. 31. A regular polygon **is that which has all its sides equal, and all its angles** equal. Def. 32. A circk la a plane figure, bounded by a single curve line, called its circumference,... | |
| Euclid - 1822 - 179 pages
...quadrilateral figure, Fig. \\. whose opposite sides are parallel. 31. A square is a quadrilateral figure, **which has all its sides equal, and all its angles right angles.** 32. Rectilineal figures, which have more than four sides, are called polygons. Postulates. 1 . Let... | |
| George Crabb - Industrial arts - 1823 - 732 pages
...sides. The principal of these figures are as follow : namely — The square, ie a foursided figure, **which has all its sides equal, and all its angles right angles,** as ABCD, fig. 13. — An oblong square, a figure having all its angles right angles, but not all its... | |
| Peter Nicholson - Mathematics - 1825 - 372 pages
...angle. ELEMENTS OF KL'CI.I.), 161 29. An acute-angled triangle ¡s that which has three acute anglesSO. **Of four-sided figures, a square is that which has...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.... | |
| Education - 1825 - 498 pages
...mathematical figures, The mother draws quadilateral figures of four equal sides. A four-sided figure **which has all its sides equal, and all its angles right angles,** is called a square. Try whether the square I have drawn is correct. She makes three squares of equal,... | |
| George Lees - 1826 - 266 pages
...XXV.— An acute angled triangle, is that which has three acute angles. Book I. XXVI. — Of four sided **figures, a square is that which has all its sides equal, and all its angles right angles.** XXVII. — An oblong, is that which has all its angles right angles, but has not all its sides equal.... | |
| Euclid, John Playfair - Euclid's Elements - 1826 - 326 pages
...that whieh has all its sides equal, and all its angles right angles. XXVI. An oblong, is that whieh **has all its angles right angles, but has not all Its sides equal.** XXVII. A rhombus, is that whieh has all its sides equal, but its angles are not right angles. XXVHI.... | |
| Robert Simson - Trigonometry - 1827 - 513 pages
...an obtuse angle. A ^? A XXIX. An acute angled triangle, is that which has three acute angles. xxx. **Of four-sided figures, a square is that which has...angles right angles, but has not all its sides equal.** XXXII. A rhombus, is that which has all its sides equal, but its angles are not right angles. XXXIII.... | |
| John Playfair - Geometry - 1829 - 186 pages
...quadrilateral figures, a square Is that which has one right angle, and all its sides equal. 34. A rectangle **is that which has all its angles right angles, but has not all its sides equal.** 35. A parallelog"am is that which has its two opposite sides parallel. 36. A trapezium is a four-sided... | |
| Pierce Morton - Geometry - 1830 - 584 pages
...its sides equal and all its angles equal ; and, since there is evidently some greatest, the greatest **is that which has all its sides equal and all its angles** equal. PROP. 27. Spherical pyramids, which stand upon equal bases, are equal to one another; to, likewise,... | |
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