| Henry Major - Student teachers - 1873 - 588 pages
...named from three or one letters, as ABC or B. X. When a straight line standing oil another straight **line makes the adjacent angles equal to one another,...and the straight line which stands on the other is** _ called a perpendicular to it. XI. An obtuse angle is greater than a right angle. XII. An acute angle... | |
| William Alexander Myers - Circle-squaring - 1873 - 238 pages
...; *that is, having a common center, as at F. 14. When a straight line standing on another straight **line makes the adjacent angles equal to one another, each of the angles is** a right angle, and the straight line which stands on the other is called a perpendicular to it; IKL... | |
| Edward Atkins - 1874 - 428 pages
...are adjacent angles. eHF^CHG But when a straight line, standing on another straight are "l""1line, **makes the adjacent angles equal to one another, each...straight line AB. QEF Proposition 13.— Theorem.** The angles which one straight line makes with another upon (me side of it, are either two right angles,... | |
| Edward Atkins - 1874 - 426 pages
...by the letter at that point, as the angle E. 10. When a straight line standing on another straight **line makes the adjacent angles equal to one another,...stands on the other is called a perpendicular to it.** 1 1 . An obtuse angle is that which is greater than a right angle. 12. An acute angle is that which... | |
| Euclides - 1874 - 120 pages
...angle ECF [I. 8], and they are adjacent angles. But 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** [Def. 10] ; therefore each of the angles DCF, ECF is a right angle. Therefore from the giveu point... | |
| William Alexander Myers - Circle-squaring - 1874 - 207 pages
...circles ; that is, having a common center, as at F. 14. When a straight line standing on another straight **line makes the adjacent angles equal to one another, each of the angles is** a right angle, and the straight line which stands on the other is called a perpendicular to it; IKL... | |
| Euclides - 1874 - 342 pages
...cmgle ADG is equal to the angle GDB (I. 8), but when a straight line standing upon another straight **line makes the adjacent angles equal to one another, each of the angles is** a right angle (I. Def. 10) ; therefore 2. The angle GDB is a right angle ; but FDB is likewise a right... | |
| Richard Wormell - 1876 - 268 pages
...line standing on another straight line makes 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** said to be perpendicular to it. 19. When one straight line meeting another straight line makes the... | |
| Robert Potts - Geometry - 1876 - 446 pages
...angle ADG is equal to the angle GDB : (i. 8.) but when a straight line standing upon another straight **line makes the adjacent angles equal to one another, each of the angles is** a right angle; (i. def. 10.) therefore the angle GDB is a right angle : but FDB is likewise a right... | |
| Edward Atkins - 1876 - 130 pages
...is equal to tho angle BDG (I. 8). .•_. But when a straight line, standing on another straight ~z **line, makes the adjacent angles equal to one another, each of the angles** ia called a right angle (I. Def. 10). Suppose G the centre. Therefore the angle GDB is a right angle.... | |
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