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. The inclination of a straight line to a plane is, The Thirteen Books of Euclid's Elements - Page 262by Euclid, Johan Ludvig Heiberg - 1908Full view - About this book
| 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 - 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... | |
| John Mason Good, Olinthus Gilbert Gregory - 1813
...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 angle contained by that straight line, and another drawn from the point in which the first... | |
| 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 - Circle-squaring - 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... | |
| John Mason Good, Olinthus Gilbert Gregory - 1819
...at right angles to a plane, when it makes right angles with every straight line meeting it in that **plane. 5. 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... | |
| 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... | |
| |