 | Euclides - 1846
...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 : Then, because AB is at right angles to the plane CK, therefore it makes right angles with every straight... | |
 | John Playfair - 1847 - 317 sider
...right angles to the plane CK Let any plane DE pass-through AB, and let CE be the common section ot the planes DE, CK ; take any point F in 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... | |
 | Samuel Hunter Christie - 1847
...plane MN. Let any plane DE pass through AB, and let CE be the common section of the planes DE, MN; take any point F in CE, from which draw FG in the plane DE at right angles to CE (I. 11). Because AB is perpendicular to the plane MN, therefore it is also perpendicular to every straight... | |
 | Euclides - 1855
...angles to that plane. DEMONSTRATION. 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 (a): and because AB is perpendicular to the plane CK, therefore it is also perpendicular to every straight... | |
 | John Playfair - 1856 - 318 sider
...right angles to the plane CK. Let any plane DE pass through AB, and let CE be the common section rf the planes DE, CK ; take any point F in CE, from which draw FG in ae plane DE at right angles to CE : And because AB is perpendicular to the plane CK, therefore it is... | |
 | Eucleides - 1860
...plane. DEMONSTRATION. Let 3> G- A. & 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 (a) : and because AB is perpendicular to the plane CK, therefore it is also perpendicular to every... | |
 | Euclides - 1864
...right angles to the plane CK. DGAH 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... | |
 | Euclides - 1865
...angles to tne plane CK. CONSTRUCTION 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.) DEMONSTRATION And because AB is perpendicular to the plane CK, therefore it is also perpendicular... | |
 | Euclid, Isaac Todhunter - 1867 - 400 sider
...B Let any plane DE pass through AB, and let CE be the common section of the planes DE, CK; [XI. 3. ^take any point F in ' CE, from which draw FG, in the plane DE, at right angles to CE. [I. 11. Then, because AB is at right angles to the plane CK, [Hypothesis. therefore it makes right... | |
 | Euclid, Isaac Todhunter - 1867 - 400 sider
...CK. H Let any pkne DE pa*= through AB, and let CE be the common section of the planes DE, CK; [XI. 3. take any point F in CE, from which draw FG, in the plane DE, at right angles to CE. [I. 11. Then, because AB is at right angles to the plane CK, [Hypothesis. therefore it makes right... | |
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AB shall be 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... 
