| Robert Simson - Trigonometry - 1804
...angles wife a right angle; therefore AB is parallel b to FG. and AB is at b. 2s. t, when the ftraight **lines drawn in one of the planes, at right angles to the** fame plane c . but one plane is at right angles to another plane cs it. Book XI. to their common feftion,... | |
| Euclid, Robert Simson - Euclid's Elements - 1806 - 518 pages
...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** perpendicularly to the common section of the two planes are perpendicular to the other plane. V. The... | |
| Euclid, Robert Simson - Geometry - 1810 - 518 pages
...it makes right angles with every straight line metiin it in that plane. IV. A plane is perpendicular **to a plane, when the straight lines drawn in one of the planes** perpendicularly to the common section of the two planes, are perpendicular to the other plane. V. Tire... | |
| Euclides - 1814
...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** perpendicularly to the common section of the two planes are perpendicular to the other plane. V. The... | |
| John Playfair - 1819 - 317 pages
...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 - Trigonometry - 1819 - 333 pages
...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. HI. The... | |
| Euclid, Robert Simson - Mathematics, Greek - 1821 - 516 pages
...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** perpendicularly to the common section of the two planes, are perpendicular to the other plane. The... | |
| Peter Nicholson - Mathematics - 1825 - 372 pages
...make! 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** perpendicularly to the common section of the two planes, are perpendicular to the other plane. V. The... | |
| Euclides - 1826
...angles with every v<— •v**' 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 - Euclid's Elements - 1826 - 320 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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