| John Keill - Logarithms - 1723 - 364 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 - 399 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 - Trigonometry - 1806 - 311 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 - 317 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 - Celestial mechanics - 1821 - 344 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 - 513 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,... | |
| Francis Nichols - Mathematics - 1829 - 186 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
...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,... | |
| Jeremiah Day - Mathematics - 1836 - 472 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 - 1841
...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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