 | R. H. Warn, John G. Horner - 2002 - 292 pages
...and thickness. 51. Tho boundaries of a solid are surfaces. 52. A solid angle is that which is made by more than two plane angles, which. are not in the same plane, meeting at one paint. 53. A pyramid is a solid figure contained by planes, one of which is the base,... | |
 | Giora Hon, Bernard R. Goldstein - 2008 - 337 pages
...definition of a solid angle before the problematic Definition 10: Book XI, Def. ix. A solid angle is that which is made by the meeting of more than two...plane angles, which are not in the same plane, in one point.42 And only then did he define similar solid bodies while explicitly omitting the problematic... | |
 | 562 pages
...in the same surface, towards all the lines. Otherwise : A solid angle is that which is contained by more than two plane angles which are not in the same plane and are constructed to one point. 12. A pyramid is a solid figure, contained by planes, which is constructed... | |
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Two planes are said to have the same or a like inclination to one another which two other planes have, when the said angles of inclination are equal to one another. 
