| Robert Potts - 1865 - 528 pages
...15.) therefore the angle FHC is equal to the angle GHC; (i. 8.) and these are adjacent angles. But **when a straight line standing on another straight...the adjacent angles equal to one another, each of** them is a right angle, and the straight line which stands upon the other is called a perpendicular... | |
| Euclides - 1865 - 80 pages
...lines which meet in a point, called the vertex of an angle, and the two lines are called its sides. 9. **When a straight line standing on another straight line makes the adjacent angles equal,** each of them is called a RIGHT ANGLE; and the straight line which stands upon the other is called a... | |
| Euclides - 1865 - 402 pages
...therefore the angle AFE is equal to the angle BFE ; (I. 8) but 'when a straight line standing upon **another straight line makes the adjacent angles equal to one another, each of** them is a right angle ; (i. def. 10) therefore each of the angles AFE, BFE, is a right angle; wherefore... | |
| William Harris Johnston - 1865 - 478 pages
...other angle between them, such as the angles ВАС and DA 0. When one straight line standing upon **another straight line makes the adjacent angles equal to one another, each** such angle is called a right angle, and either of the straight lines is said to be a perpendicular... | |
| Edward Clarke Lowe - 1866 - 172 pages
...two straight lines to one another, which meet together, but are not in the same straight line. 10. **When a straight line standing on another straight...the adjacent angles equal to one another, each of** these angles is called a right angle; and the straight line which stands on the other is & perpendicular... | |
| Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 424 pages
...[Definition 24. therefore the angle DCF is equal to the angle ECF; [I. 8. and they are adjacent angles. But **when a straight line, standing on another straight...another, each of the angles is called a right angle** ; ' [Definition 10. therefore each of the angles DCF, ECF is a right angle. Wherefore/row the given... | |
| Isaac Todhunter - Euclid's Elements - 1867 - 426 pages
...from the centre G ; [I. Definition 15. therefore the angle ADG is equal to the angle BDG. [I. 8. But **when a straight line, standing on another straight...adjacent angles equal to one another, each of the** angle's is called "a right angle ; [I. Definition 10. therefore the angle BDG is a right angle. But... | |
| George Frederick Chambers - Astronomy - 1867 - 888 pages
...lines to each other in the same plane gives rise to a plant rectilineal angle, or simply an angle. **When a straight line, standing on another straight line, makes the adjacent angles equal to** each other, each of those angles is called a right angle; but if the adjacent angles are not equal... | |
| Robert Potts - 1868 - 434 pages
...the angle AB D, or DBA ; and that which is contained by DB, CB, is called the angle DBG, or CBD. I **When a straight line standing on another straight...the adjacent angles equal to one another, each of** these angles is called a right angle ; and the straight line which stands on the other is called a... | |
| William Schofield Binns - 1881 - 214 pages
...straight lines to one another, meeting or cutting each other in a point, as (10) "When a straight lino **standing on another straight line makes the adjacent...stands on the other is called a perpendicular to it."** The angles AB c, A n D, are right angles. Obi. 1 . Because DB is in the same straight line with B c,... | |
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