 | Alexander Ingram - 1799 - 374 sidor
...to the third plane. Wherefore, if two planes, &c. Q^ ED u/j.Oef.n. b i3I PROP. XX. THEOR. F a folid angle be contained by three plane angles, any two of them are greater than the third. Let the folid angle at A be contained by the three plane angles BAC, CAD, DAB. Any two of them are... | |
 | John Playfair, Euclid - 1804 - 468 sidor
...perpendicular to the two given lines, AB and CD. Which was to be doneBook nI PROP. XX. T fL EO R. F a folid angle be contained by three plane angles, any two of them are greater than the thjrd. Let the folid angle at A be contained by the three plane angles BAC, CAD, DAB. Any two of them... | |
 | 1804 - 476 sidor
....42.3.4.51 _ ... 51 C\ Iiif 2. Add together i of 5s. 6d., f of J of 17s. 2id., and | of £5. 6s. 7?d. 3. If a solid angle be contained by three plane angles, any two of these are greater than the third. 4. Prove that the sum of the tangents of two arcs is to the difference... | |
 | John Playfair - 1806 - 320 sidor
...« Def. lperpendicular to the two given lines AB, CD. Which was 2- Supto be done. PROP. XX. THEOR. IF a solid angle be contained by three plane angles, any two of them are greater than the third. Let the solid angle at A be contained by the three plane angles BAC, CAD, DAB ; any two of them are... | |
 | John Mason Good - 1813 - 714 sidor
...perpendicular to a third plane; their common section shall be perpendicular to the same plane. Prop. XX. Theor. If a solid angle be contained by three plane angles, any two of tuem are greater than the third. Prop. XXI. Theor. Every solid angle is contained by plain angles which... | |
 | John Mason Good - 1819 - 800 sidor
...to a third plane ; their common section shall be perpendicular to the same plane. Prop. XX. Theor. If a solid angle be contained by three plane angles, any two of them are greater than the third. Prop. XXI. Theor. Every solid angle is contained by plane angks which together are less than loar right... | |
 | Abraham Rees - 1819 - 754 sidor
...perpendicular to a third plane, their common feftion (hall be perpendicular to the fame plane. XX. If a folid angle be contained by three plane angles, any two of them are greater than the third. XXI. Every folid angle is contained by plane angles, which together are lets than four right angles.... | |
 | John Playfair - 1819 - 354 sidor
...drawn perpendicular to the two given lines, AB and CD. Which was to be« done. • PROP. XX. THEOR. If a solid angle be contained by three plane angles, any two of theseangles are greater than the third. Let the solid angle at A be contained by the three plane angles... | |
 | Euclid, Robert Simson - 1821 - 514 sidor
...therefore is perpendicular to the third plane- Wherefore, if two planes, &c. QED PROP. XX. THEOR. IP a solid angle be contained by three plane angles, any two of them are greater than the third.* Let the solid angle at A be contained by the three plane angles, BAC, CAD, DAB. Any two of them are... | |
 | 1821 - 464 sidor
...24 acres in 7 days ? 2. Add together '$ of 5*. 6d., $ of i of 17*. 2+d., and f of £5. 6s. 1\d. 3. If a solid angle be contained by three plane angles, any two of these are greater than the third". 4. Prove that the sum of the tangents of two arcs is to the difference... | |
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If a solid angle be contained by three plane angles, any two of them are greater than the third. 
