| John Keill - 1723 - 364 sider
...the Angle AFE j. g ti fhall bef equal to the Angle BFE. But when a Right Line {landing upon a Right **Line makes the adjacent Angles equal to one another, each of the** equal Angles is ia Right Angle. Wherefore AFE, or BFE, is a Right Angle. And therefore the Right Line... | |
| John Keill - 1733 - 397 sider
...Therefore the Angle * 8- i. AD G is * equal to the Angle GD B. But when a Right Line ftanding upon 'a Right **Line, makes the adjacent Angles equal to one another, each of the** 10. i. equal Angles will f be a Right Angle. Wherefore the Angle GDB is a Right Angle. But FDB is alfo... | |
| Euclid, Edmund Stone - 1765 - 464 sider
...angle EH c [by prop. 8.] ; and thefe are adjacent angles. But when a right line flanding upon a right **line makes the adjacent angles equal to one another, each of the** equal angles is a right angle, and the ftanding right line is called a perpendicular to that upon which... | |
| Joseph Fenn - 1769
...When a ftraight line (AB) {landing on another ftright line (CD) makes the adjacent angles (ABD, ABC,) **equal to one another, each of the angles is called a right angle ; and the** rtraight line (AB) which ftands on the other (CD) is called я perpendicular. Fig. 7. XI. An Obtvfe... | |
| Robert Simson - 1775 - 520 sider
...equal' to the angle CHG; and they are adjacent angles ; but when a ftraight line ftanding cet on a **ftraight line makes the adjacent angles equal to one another, each of** them is a right angle, and the ftraight line which flands upon the other is called a perpendicular... | |
| Euclid, James Williamson - 1781 - 309 sider
...angle contained by ECF, and they are adjacent or confequent: but when a ftraight line ftanding upon a **ftraight line makes the adjacent angles equal to one another; each of the** equal angles is a right angle: therefore each of the angles contained by DCF, FCE is a right angle.... | |
| Euclid - 1781 - 520 sider
...is equal e to the angle GDB : Buk when a ftraight line flanding upon another ftraight line makes A **the adjacent angles equal to one another, each of the angles is** a right an. J£ gled: Therefore the angle GDB is a * dio.def.r. Tight angle : But FDB is likewife a... | |
| Thomas Beddoes - 1793 - 172 sider
...whether they are plane or otherwife. DEFINITION X, When a Jlfaight line ftanding on another Jiraight **line makes the adjacent angles equal to one another,...each of the angles is called a right angle, and the** line which Jlands on the other is called a perpendicular to it. Here we have an appeal made to the... | |
| John Playfair - 1795 - 400 sider
...is equal d to the 111 .le CKG ; 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 flraight line which ftands upon the other is called a perpendicular... | |
| Alexander Ingram - 1799 - 351 sider
...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... | |
| |