 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 : (Ю.  Explanatory Mensuration - Page 2by Alfred Hiley - 1879 - 188 pagesFull view - About this book
 | Euclides - 1814 - 560 pages
...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 other is called a perpendicular... | |
 | Euclides - 1816 - 588 pages
...because they are drawn from the centre G*: Therefore the angle ADG is equal0 to the angle GDB : But when a straight line standing upon another straight...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... | |
 | John Playfair - Circle-squaring - 1819 - 350 pages
...they are radii of the same circle, : therefore the angle ADG is equal (8. 1.) to the angle GDB : Bat when a straight line standing upon another straight...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... | |
 | John Playfair - 1819 - 354 pages
...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 other is called a perpendicular... | |
 | Peter Nicholson - Mathematics - 1825 - 1046 pages
...they are drawn from the centre G :* Therefore the angle ADG is equal (8. 1.) to the angle GDB : But when a straight line standing upon another straight...the adjacent angles equal to one another, each of the angles is a right angle : (Ю. Def. 1 .) Therefore the angle GDB is a right angle. But FDB is likewise... | |
 | Euclides - 1826 - 226 pages
...to the angle CHE, b and they are adjacent angles. But when a right line standing upon another right line makes the adjacent angles equal to one another, each of them is a right angle, and the right line standing upon the other is called a perpendiFor because GH is equal... | |
 | Euclid - 1826 - 234 pages
...to the angle cHE,b and they are adjacent angles. But when a right line standing upon another right line makes the adjacent angles equal to one another, each of them is a right angle, and the right Hue standing upon the other is called a perpendi«ic.Def.i. cular;0 wherefore... | |
 | Robert Simson - Trigonometry - 1827 - 546 pages
...because they are drawn from the centre GJ: there's 1. fore the angle ADG is equal* to the angle GDB: but when a straight line standing upon another straight...line makes the adjacent angles equal to one another, •lODef.1. each of the angles is a * right angle; therefore the t Constr. angle GDB is a right angle:... | |
 | Thomas Curtis - Aeronautics - 1829 - 814 pages
...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 other is called a PERPENDICULAR.... | |
 | Pierce Morton - Geometry - 1830 - 584 pages
...cuse the middle letter, as A, always denotes the angular point. lu. (Eue. i. def. 10.) ЛТпеп а straight line standing upon another straight line makes the adjacent angles equal to one anolher, each of th тп is called a right angle, and the straight line which stands upon the other... | |
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