| A. Bell - Conic sections - 1837 - 164 pages
...any plane DE pass through AB, and let CE be the common section of the planes DE, CK ; take any point **in CE, from which draw FG in the plane DE at right angles to CE. And** hecause AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight line... | |
| Euclid, James Thomson - Geometry - 1837 - 390 pages
...through AB is perpendicular to CK. Let any plane DEpass through AB, and let CE be its common section with **CK ; take any point F in CE, from which draw FG in the plane DE** perpendicular to CE. Then, because AB is perpendicular to CK, it is perpendicular (XI. def. 1.) to... | |
| Euclid, Robert Simson - Geometry - 1838 - 416 pages
...at right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section **of the planes DE, CK ; take any point F in CE, from which draw FG in the plane DE at right** D angles to CE ; and because AB is , perpendicular to the plane CK, therefore it is also perpendicular... | |
| Euclides - Geometry - 1841 - 351 pages
...angles to the plane CK ; every plane which passes through AB shall be at right angles to the plane CK. * **any point F in CE, from which draw FG in the plane DE at right* angles to CE; and** fe_j._*.._j?,_ " * 11. I. because AH is perpendicular is also perpendicular to every to the plane CK,... | |
| John Playfair - Euclid's Elements - 1842 - 317 pages
...at right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section **of the planes DE, CK ; take any point F in CE, from...draw FG in the plane DE at right angles to CE : And** because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight line... | |
| Euclides - 1842
...at right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section **of the planes DE, CK ; take any point F in CE, from...draw FG in the plane DE at right angles to CE. And** because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight line... | |
| Euclides - 1845
...at right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section **of the planes DE, CK; take any point F in CE, from...which draw FG in the plane DE at right angles to CE.** (i. 11.) And because AB is perpendicular to the plane CK, therefore it is also perpendicular to every... | |
| Euclid, James Thomson - Geometry - 1845 - 352 pages
...AB is perpendicular to CK. Let any plane DE pass through AB, and let CE be its common section with **CK ; take any point F in CE, from which draw FG in the plane DE** perpendicular to CE. Then, because AB is perpendicular to CK, it is perpendicular (XI. def. 1) to CE,... | |
| Euclid - Geometry - 1845 - 199 pages
...through AB, and let CE be the common section of the planes DE, CK ; take D <> A „ H ' ' any point rm **CE, from which draw FG, in the plane DE, at right angles to CE : And** because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight line... | |
| Euclid, John Playfair - Euclid's Elements - 1846 - 317 pages
...right angles to the plane CK. Let any plane , DE pass through AB, and let CE be the common section **of the planes DE, CK ; take any point F in CE, from...draw FG in the plane DE at right angles to CE : And** because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight line... | |
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