 | Euclides - 1874 - 342 pages
...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, 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. 5. The... | |
 | Robert Potts - Geometry - 1876 - 446 pages
...angles to a plane, when it makes right angles with every straight line meeting it in that plane. 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... | |
 | Isaac Todhunter - Euclid's Elements - 1880 - 426 pages
...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, 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. 5. The... | |
 | Euclid, Isaac Todhunter - Euclid's Elements - 1883 - 428 pages
...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, 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. 5. The... | |
 | Euclides, James Hamblin Smith - 1883 - 376 pages
...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 pkne. IV. The inclination of a straight line to a plane is the acute angle, contained by that straight... | |
 | Edward Mann Langley, W. Seys Phillips - 1890 - 538 pages
...with every straight line meeting it in that plane. 4. A plane is ' perpendicular,' or at right angles, 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. 5. The... | |
 | Morris Kline - Mathematics - 1990 - 434 pages
...all the straight lines which meet it and are in the plane. Definition 4. A plane is at right angles to a plane when the straight lines drawn, in one of the planes, at right angles to the common section of the planes, are at right angles to the remaining plane. Definition... | |
 | 562 pages
...angles with all the straight lines which meet it and are in the plane. '4. A plane is at right angles to a plane when the straight lines drawn, in one of the planes, at right angles to the common section of the planes are at right angles to the remaining plane. 5.... | |
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The inclination of a straight line to a plane is the acute angle contained by that straight line, and another drawn from the point in which the first line meets the plane, to the point in which... 
