| Rev. John Allen - 1822 - 494 sider
...perpendicular to the base. 30. An oblique cylinder, is one, whose axis is not perpendicular to the base. 31. **A tetrahedron, is a solid figure, contained by four equal and equilateral triangles.** 32. A cube or hexahedron, is a solid figure contained by six equal squares. 3$. An octahedron, is a... | |
| Rev. John Allen - 1822 - 494 sider
...triangles. 34. A dodecahedron, is a solid figure, contained by twelve regular pertagons. s •'. ATI **octahedron, is a solid figure, contained by eight equal and equilateral triangles.** 35. An icosihedron, is a solid figure, contained by twenty equal and equilateral triangles. POSTULATE.... | |
| George Crabb - 1823
...of the parallelogram. — A cube is a solid figure contained by six equal squares, as fig. 49. — **A tetrahedron is a solid figure contained by four equal and equilateral triangles,** as fig. 50. — Octahedron, a solid figure contained by eight equal and equilateral triangles, as fig.... | |
| Robert Simson - 1827 - 513 sider
...cylinder are the circles described by the two revolving opposite sides of the parallelogram. XXIV. **Similar cones and cylinders are those which have their...six equal squares. XXVI. A tetrahedron is a solid** f1gure contained by four equal and equilateral triangles. XXVII. An octahedron is a solid figure contained... | |
| John Playfair - 1833 - 333 sider
...the circles described by the two revolving opposite sides of the parallelogram. XVII. Similar conns **and cylinders are those which have their axes, and the diameters of their** biises proportionals. PROP. I. THEOR. If two solids be contained by the same number of equal and similar... | |
| Euclid - 1837 - 390 sider
...ends, of a cylinder are the circles described by the two revolving opposite sides of the rectangle. 27. **Similar cones and cylinders are those which have their...axes and the diameters of their bases proportionals.** PROP. I. THEOR. ONE part of a straight line cannot be in a plane, and another part above it. If it... | |
| Euclid - 1838 - 416 sider
...cylinder are the circles described by the two revolving opposite sides of the parallelogram. XXIV. **Similar cones and cylinders are those which have their...contained by eight equal and equilateral triangles.** XXVffl. A dodecahedron is a solid figure contained by twelve equal pentagons which are equilateral... | |
| Euclides - 1841
...cylinder are the circles described by the two revolving opposite sides of the parallelogram. XXIV. **Similar cones and cylinders are those which have their...contained by eight equal and equilateral triangles.** U XXVIII. A dodecahedron is a solid figure contained by twelve equal pentagons which are equilateral... | |
| John Playfair - 1842 - 317 sider
...a cylinder are the circles described by the two revolving; opposite sides of the parallelogram. 17. **Similar cones and cylinders are those which have their...axes, and the diameters of their bases proportionals.** PROP. I. THEOR. If two solids be contained by the same number of 'equal and similar planes sin.ilarly... | |
| Euclides - 1842
...situated between the base CD and a section cd parallel to the base. IX. Similar cylinders and cones **are those which have their axes and the diameters of their bases** proportional; that is, which are described by similar rectangles, or similar rightangled triangles.... | |
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