 | Andrew Mackay - Astronomy - 1804 - 354 pages
...this table more generally useful, it is adapted both, to the English and Scots chains. ч TABLE LXXVt. 'Properties of the Platonic Bodies, A regular, solid is that which is contained by like, «qual, and regular plane figures, and whose solid angles are all equal : of these there are only five,... | |
 | Royal society of arts - 1847 - 634 pages
...90°, which exhibit the harmonic ratios of 4 to 5 and 1 to 5. there can be no other solids bounded by like equal and regular plane figures, and whose solid angles are all alike. These three primary triangles may therefore be considered the root of all geometric beauty.... | |
 | Olinthus Gregory - 1863 - 482 pages
...axis by the fixed axis, and that product by -5236. 7. Regular or platonic bodies, are comprehended by like, equal, and regular plane figures, and whose solid angles are all equal. There are only five regular solids, viz. The tetraedron, or regular triangular pyramid, having 4 triangular... | |
 | Richard Pears Wright - 1882 - 136 pages
...they were first described by Plato (400 BC). Besides these five, there can be no other solids bounded by like equal and regular plane figures, and whose solid angles are all equal. 14. The next set of solids of which we shall speak are prisms. A prism is a solid bounded by faces,... | |
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Regular or platonic bodies, are comprehended by like, equal, and regular plane figures, and whose solid angles are all equal. 