 | John Playfair - Mathematics - 1806 - 320 pages
...Book I. An acute angled triangle is that which has three acute angles, i XXV. Of four sided figures, a square is that which has all its sides equal, and all its angles right angles. XXVI. An oblong is that which has all its angles right angles, but has not all its sides equal. XXVII.... | |
 | Robert Simson - Trigonometry - 1806 - 546 pages
...XXIX. An 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. Aii oblong is that which has all its angles right angles, but has not all its sides equal. XXXII.... | |
 | John Mason Good - 1813 - 714 pages
...angled triangle, is that which ha* three arute angles. ¡ ' 50. Of four sided figures, asqnnre isthat which has all its sides equal, and all its angles right angles. 51. An oblong, is that which has all its angles right angles, Lu' has not all its sides equal. 32.... | |
 | Euclides - 1816 - 588 pages
...XXIX. Anacute angled triangle is that. which has three acute angles, XXX. T 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.... | |
 | John Playfair - Circle-squaring - 1819 - 350 pages
...XXIV. An acute angled triangle, is that which has three acute angles. XXV. Of four sided figures, a square is that which has all its sides equal, and all its angles right angles. y . XXVI. An oblong, is that which hat all its angles right angles, but has not all its sides equal.... | |
 | 1854 - 1112 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 - 222 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 - 704 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 - 1046 pages
...161 29. An acute-angled triangle ¡s that which has three acute anglesSO. 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.... | |
 | 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,... | |
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A RHOMBUS is that which has all its sides equal, but its angles are not right angles. 
