| 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... | |
| 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,... | |
| 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... | |
| 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... | |
| 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... | |
| 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.... | |
| 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... | |
| 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... | |
| 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... | |
| 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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