 | Robert Simson - Trigonometry - 1806 - 546 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...the two planes are perpendicular to the other plane. V. The inclination of a straight line to a plane is the acute angle contained by that straight line... | |
 | John Playfair - Mathematics - 1806 - 320 pages
...II. plane, when it makes right angles with every 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.... | |
 | John Mason Good - 1813 - 714 pages
...angles with every straight line meeting it in that plane. 4. A plane is perpendicular to a plane, »hen the straight lines drawn in one of the planes perpendicularly to the common section of the two planes, arc perpendicular to the other plane. 5. The inclination of a straight line to a plane is the acute... | |
 | Euclides - 1816 - 588 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...the two planes are perpendicular to the other plane. V. The inclination of a straight line to a plane is the acute angle contained by that straight line,... | |
 | John Mason Good - 1819 - 800 pages
...straight line meeting it in that plane. 4. A plane is perpendicular to a plane, when the straiglit lines drawn in one of the planes perpendicularly to...two planes, are perpendicular to the other plane. 5. The inclination of a straight line to a plane is the acute angle contained by that straight line,... | |
 | John Playfair - 1819 - 354 pages
...angles to a plane, when it makes right angles with every 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... | |
 | John Playfair - Circle-squaring - 1819 - 350 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 plane. III. The inclination of a straight line to a plane is the acute angle contained by that straight line,... | |
 | George Crabb - Industrial arts - 1823 - 704 pages
...when it makes right angles with every straight line meeting it in that plane, as AB in fig. 36. — A plane is perpendicular to a plane when the straight...of the two planes are perpendicular to the other, as ABC, fig. 37. — The inclination of a straight line to a plane is the acute angle contained by... | |
 | Peter Nicholson - Mathematics - 1825 - 1046 pages
...angles to a plane, when it make! right angles with every straight line meeting it in that plane. IV. A plane is perpendicular to a plane, when the straight...two planes, are perpendicular to the other plane. V. The inclination of a straight line to a ¡.hue is the acute angle contained by that straight line,... | |
 | Euclid, John Playfair - Euclid's Elements - 1826 - 326 pages
...makes right angles with every straight line whieh it meets in that plane. n. A plane is perpendieular to a plane, when the straight lines drawn in one of the planes perpendieular to the eommon seetion of the two planes, are perpendieular to the other plane. III. The... | |
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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... 
