 | Euclides - Geometry - 1841 - 378 pages
...le:ter 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 - 1842 - 316 pages
...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... | |
 | John Playfair - Euclid's Elements - 1842 - 332 pages
...angle ADG is equal (8. 1.) 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 (7. def. 1.) Therefore the angle GDB is a right angle: But FDB is likewise... | |
 | William Pease - Geometry - 1843 - 80 pages
...the intersection of two of its great circles. 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... | |
 | Euclid - Geometry - 1845 - 218 pages
...ADGisequalJ to the angle GDB : but ~ ^J£^.." t i. .. 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 ||; therefore I! 10. Def the angle GDB is a right angle : But FDB is likewise... | |
 | Euclides - 1845 - 546 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... | |
 | Scottish school-book assoc - 1845 - 444 pages
...called simply the »ngle at E, PLANE GEOMETRY. 9. 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 strnight line which stands on the other is called a perpendicular... | |
 | Euclid, John Playfair - Euclid's Elements - 1846 - 334 pages
...placed at that point ; as the ' angle at £.' 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... | |
 | Euclid, Thomas Tate - 1849 - 120 pages
...angle ADG is equal (i. 8.) 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 (i. Def. 10.) : Therefore the angle GDB is a right angle: But FOB is likewise... | |
 | Janet Taylor - Nautical astronomy - 1851 - 674 pages
...from the circle by the lines which form the 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... | |
| |
When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to that on which it stands. 
