 | Alexander Ingram - Trigonometry - 1799 - 374 pages
...equal d to the angle , CHG ; and they are adjacent angles ; but when a ftraight line ftanding on a ftraight line makes the adjacent angles equal to one another, each of them is a right angle, and the ftraight line which ftands upon the other, is called a perpendicular... | |
 | John Playfair, Euclid - Circle-squaring - 1804 - 468 pages
...the angle ADG is equal c to the angle GDB : But when a ilraight line ftanding upon another Ilraight line makes the adjacent angles equal to one another, each of the angles is a right angle d. Therefore the angle GDB is a right angle : But FDB is likewife a right angle ; wherefore... | |
 | Robert Simson - Trigonometry - 1804 - 530 pages
...e to the angle CHG; and they are adjacent e. 8. i. :angles. but when a ftraight line flanding on a ftraight line makes the adjacent angles equal to one another, each of them is a right angle, and the ftraight line which ftands upon the other is called af perpen- f. to.Def.t.... | |
 | John Playfair - Mathematics - 1806 - 320 pages
...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 other is called a perpendicular to it. _____ VIII, Book I. An obtuse... | |
 | Robert Simson - Trigonometry - 1806 - 546 pages
...the angle ADG is equal c to the angle GDB : 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 d : therefore the angle GDB is a right angle: but FDB is likewise a '" right angle; wherefore... | |
 | John Mason Good - 1813 - 714 pages
...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 other is called a perpendicular to it. 11. An obtuse an¿le is that... | |
 | Encyclopedias and dictionaries - 1816 - 764 pages
...ai.ot 1 .r Tig JSg*. >%.?• rijr.21 / \ V_^ X' %!1^-^ %V28. !%• 32>^c » BHEA 11 l%.ll . Fig:a3. Fl ftraight line makes the adjacent angles equal to one another, each of the angles is called a KICHT ANGL.F and the ftraight line which (rands on the other u oiled a PEKPFXDICI'LAR. Fig. 4. 8. An... | |
 | Euclides - 1816 - 588 pages
...the angle ADG is equal0 to the angle GDB : 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 d: Therefore the angle GDB is a right angle: MoDef. ' But FDB is likewise a right antrle... | |
 | John Playfair - 1819 - 354 pages
...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 other is called a perpendicular to it. VIII. An obtuse angle is that... | |
 | John Playfair - Circle-squaring - 1819 - 350 pages
...angle ADG is equal (8. 1.) to the angle GDB : Bat 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 (7. def. 1.). Therefore the angle GDB is a right angle: But FDB is likewise a right angle... | |
| |
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 other is called a perpendicular to it. 
