 | Euclid, John Keill - Geometry - 1723 - 436 pages
...parallel to F G. But AB is at Right 1 8 of this. Angles to the Plane CL. Therefore FG will be f at Right Angles to that fame Plane. But one Plane is...drawn in one of the Planes perpendicular to the common $ Def.+. Section of the Planes, are ^ perpendicular to the other of this. Plane. But FG is drawn in... | |
 | John Keill - Geometry - 1782 - 472 pages
...is parallel to F G. But AB is at Right Angles to the Plane CL ; therefore FG will be f at fg cftK. Right Angles to that fame Plane. But one Plane is...Section of the Planes, are j perpendicular to the other + Dif.4 »f Plane. But FG is drawn in one Plane DE, per- ilit. ' pendicular to the common Section CE... | |
 | John Playfair - Mathematics - 1806 - 320 pages
...straight line which it meets in the plane, y. II. ' A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicular to the common section of the two planes are perpendicular to the other plane. I III. f The inclination of a straight line to a plane... | |
 | John Playfair - 1819 - 354 pages
...straight line which it meets in that plane. II. A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicular to the common section of the two planes, are perpendicular to the other plane. III. The inclination of a straight line to a plane... | |
 | Pierre Simon marquis de Laplace, Thomas Young - Capillarity - 1821 - 372 pages
...meeting it in that plane. 146. DEFINITION. A plane is perpendicular to a plane, when all the straight lines, drawn in one of the planes, perpendicular to the common section, are perpendicular to the other plane. 147. DEFINITION. The inclination of a'straight line to a plane... | |
 | Robert Simson - Trigonometry - 1827 - 546 pages
...straight line in that plane which meets it. IV. A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicular to the common section of the two planes are perpendicular to the other plane. V. The inclination of a straight line to a plane,... | |
 | John Playfair - Geometry - 1829 - 210 pages
...straight line meeting it in that plane. 2. A plane is perpendicular to a plane, when all the straight lines drawn in one of the planes perpendicular to the common section of the two planes are perpendicular to the other plane. 3. The inclination of a straight line to a plane is... | |
 | Euclides - 1834 - 518 pages
...straight line in that plane which meets it. IV. A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicular to the common section of the two planes, are perpendicular to the other plane. V. The inclination of a straight line to a plane,... | |
 | Mathematics - 1836 - 488 pages
...straight line which it meets in that plane. 2. A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicular to the common section of the two planes, are pendendicular to the other plane. 3. The inclination of a straight line toa planeis... | |
 | Thomas Grainger Hall - Geometry, Descriptive - 1841 - 214 pages
...other in the other plane. (8) One plane is said to be perpendicular to another plane, when the straight lines drawn in one of the planes perpendicular to the common section of the two planes are perpendicular to the other plane. (9) Planes which do not meet one another, though produced,... | |
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A plane is perpendicular to a plane, when the straight lines drawn in one of the planes perpendicular to the common section of the two planes, are perpendicular to the other plane. V. The inclination of a straight line to a plane... 
