 | Euclides - 1816 - 588 pages
...plane DE pass through AB, and let CE be the common section of the planes DE, CK ; take any point F H 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... | |
 | John Playfair - 1819 - 354 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... | |
 | Peter Nicholson - Mathematics - 1825 - 1046 pages
...angles to the plane CK. Let any plane DE pass through AB and let CE be the common section о the planet, DE, CK ; take any point F in CE, from which draw FG in the plane DE at rieht angles to CE: And be- С FBE саше AB is perpendicular to the plane CK, therefore it is also... | |
 | Euclid, John Playfair - Euclid's Elements - 1826 - 326 pages
...is at right angles to the plane CK. Let any plane DEpass through AB,and letCE be the eommon seetion of the planes DE, CK; take any point F in CE, from whieh draw FG in the plane DEat right angles to CE : And beeause AB is perpendieular to the plane CK,... | |
 | Robert Simson - Trigonometry - 1827 - 546 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 t 11. 1. in the plane DE at rightf angles to CE: and because AB is perpendicular *3Def. 11. to the... | |
 | John Playfair - Geometry - 1829 - 210 pages
...through AB is perp. 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 perp. to CE. Because AB is perp. to the plane CK, it is also perp. to DGAH every line meeting it in... | |
 | John Playfair - Euclid's Elements - 1833 - 346 pages
...plane DE pass through AB, and let CE be the common section of the planes DE,CK ; take any point Fin 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 - 1835 - 540 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... | |
 | John Playfair - Euclid's Elements - 1837 - 332 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 lino... | |
 | A. Bell - Conic sections - 1837 - 180 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 *> *t DE at right angles to CE. And because AB is perpendicular to the plane CK, therefore it is also... | |
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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... 
