 AB, CD. In like manner, it may be proved, that FE makes right angles with every straight line which meets it in that plane. But a straight line is at right angles to a plane when it makes right angles with every straight line which meets it in that plane...  Books 10-13 and appendix - Seite 279von Euclid - 1908Vollansicht - Über dieses Buch
 | Robert Simson - 1762 - 488 Seiten
...proved that FE makes right angles with every ftraight line which meets it in that plane. But a ftraight line is at right angles to a plane when it makes right angles with every ftrajght line which meets it in that plane f. therefore EFf. 3. Def. i<. is at right angles to... | |
 | Robert Simson - 1775 - 534 Seiten
...thickneft. II. That which bounds a fblid is a fuperficies. 111. A ftraight line is perpendicular, or at right angles to a plane, when it makes right angles with every ftraight line meeting it in that plane. IV. A plane is perpendicular to a plane, when the ftraight... | |
 | Euclid - 1781 - 552 Seiten
...proved, that FE makes right angles with every ftraight line which meets it in that plane. But a ftraight line is at right angles to a plane when it makes right angles with every ftraight line which meets it in that plane f : Therefore EF is at right angles to the plane f... | |
 | Euclid, John Playfair - 1795 - 462 Seiten
...therefore it makes right angles with every ftraight line which meets it in that plane. But a ftraight line is at right angles to a plane when it makes right angles with every ftraight line which meets it in that.plane f : therefore EK is at right an.-V f i.3 to the plane... | |
 | Alexander Ingram - 1799 - 374 Seiten
...angles with every ftraight line which meets it in the plane paffing through AB, CD. But a ftraight line is at right angles to a plane when it makes right angles with every ftraight fj.Def.ir. line which meets it in that plane i : Therefore EF is at right angles to... | |
 | Robert Simson - 1804 - 530 Seiten
...proved that FE makes right angles with every ftraight line which meets it in that plane. But a ftraight line is at right angles to a plane when it makes right angles with every ftraight line which meets it in that plane f. therefore EF fs-Def.n. is at right angles to the... | |
 | John Playfair, Euclid - 1804 - 468 Seiten
...• BOOK II. OF THE INTERSECTIoN oF PLANES. I 4 .DEFINITIONS. I. A STRAIGHT line is perpendicular, or at right angles to a plane, when it makes right angles with every ftraight * line, in that plane, which it meets. II. A plane is perpendicular to a plane, when... | |
 | Robert Simson - 1806 - 546 Seiten
...it may be proved, that FE makes right angles with every straight line which meets it in that plane. But a straight line is at right angles to a plane when it makes right angles with every straight line which meets it in that plane f : therefore EF is at right an- f 3. def. gles to... | |
 | John Mason Good - 1813 - 714 Seiten
...and thickness. 2. That which bounds a solid is a superficies. 3. A straight line is perpendicular, or at right angles to a plane, when it makes right angles with every straight line meeting it in that plane. 4. A plane is perpendicular to a plane, »hen the straight... | |
 | Euclides - 1816 - 588 Seiten
...it may be proved, that FE makes right angles with every straight line which meets it in that plane. But a straight line is at right angles to. a plane when it makes right angles with every straight line which meets it in that planefi: Therefore EF is at right .3 Def.i1. angles to the... | |
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