| John Playfair - 1806 - 311 sider
...angle at a point, it may be expressed ' by a letter placed at that point ; as the angle at E.' VII. **When a straight line standing on another straight line makes the adjacent angles equal to** .one another, each of the angles is called a right angle ; and the straight line which stands on the... | |
| John Mason Good - 1813
...of two straight lines to or.e another, which meet together, but are not in the same straight line. **10. When a straight line standing on another straight line makes the adjacent angles equal to** one another, each of the angles is called a right angle; and the straight line which stands on the... | |
| Euclides - 1814
...one angle at a point, it may be ex' pressed by a letter placed at that point; as the angle at E.' X. **When a straight line standing on another straight line makes the adjacent angles equal to** one another, each of the angles is called a right angle; and the straight line which stands on the... | |
| John Playfair - 1819 - 317 sider
...one angle at a point, it may be expressed by a letter placed at that point ; as the angle at E.' VII. **When a straight line standing on another straight line makes the adjacent angles equal to** one another, each of the angles is called a right angle ; and the straight line which stands on the... | |
| Thomas Young, Pierre Simon marquis de Laplace - 1821 - 344 sider
...described by three letters placed near the lilies, the middle letter at the angular point % 64. DEFINITION. **When a straight line standing on another straight line makes the adjacent angles equal,** they are called right angles. 65. DEFINITION. A straight line between two right angles is called a... | |
| Peter Nicholson - 1825 - 372 sider
...only one angle at a point, it may be expressed by a letter placed at that point ; as the angle at E.' **10. When a straight line standing on another straight line makes the adjacent angles equal to** one another, each of the angles is called a right angle ; and the straight line which stands on the... | |
| Robert Simson - 1827 - 513 sider
...one angle at a point, it may be expressed ' by a letter placed at that point : as the angle at E.' X. **When a straight line standing on another straight line makes the adjacent angles equal to** one another, each of the angles is called a right angle; and the straight line which stands on the... | |
| John Playfair - 1829 - 186 sider
...only one angle at a point, it may be expressed by a letter placed at that point, as -the angle at E. **10. When a straight line standing on another straight...makes the adjacent angles equal to each other, each of** the angles is called a right angle; and the straight line which stands on the other is called a perpendicular... | |
| Thomas Curtis - 1829
...that form the angle, thus С ü D or D В С denotes the angle contained by the line С В and DB. 7. **When a straight line standing on another straight line makes the adjacent angles equal to** one another, each of the angles is called a RIGHT ANGLE, and the straight line which stands on the... | |
| Thomas Perronet Thompson - 1833 - 150 sider
...equivalent. But whenever the contrary is not expressed, it is always the direct angle that is meant. XXXVII. **When a straight line standing on another straight line makes the adjacent angles equal to** one another, each of the angles is called a right angle. And the straight line which stands on the... | |
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