 | Robert Simson - 1762 - 488 σελίδες
...they are adjacent '• angles, but when a ftraight line (landing on a ftraight line makes thee- 8' l' adjacent angles equal to one another, each of them is a right angle, and the ftraight line which (lands upon the other is called a perpendicular to it. therefore from the given point C... | |
 | Robert Simson - 1775 - 534 σελίδες
...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 to it; therefore from the given point C... | |
 | Euclid, John Playfair - 1795 - 462 σελίδες
...the angle AFE is equal b to the angle BFE : But when a flraight line ftanding upon another nv.ik.es the adjacent angles equal to one another, each of them is a right c angle: Therefore each of the angles AFE, Bl' E is a right angle ; wherefore the ftraight line CD,... | |
 | Alexander Ingram - 1799 - 374 σελίδες
...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 to it ; therefore from the given point... | |
 | Robert Simson - 1804 - 530 σελίδες
...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. dicular to it. thereforefrom the... | |
 | John Playfair, Euclid - 1804 - 468 σελίδες
...angle CHG ; and they are adjacent angles; but when a ftraight line Handing on a ftraight line makes the adjacent angles equal to one another, each of them is a right angle, and the ftraight line which llands upon the other is called a perpendicular to it ; therefore from the given point C... | |
 | Robert Simson - 1806 - 546 σελίδες
...and they are adjacent -angles ; but when a straight line standing e 8- 1• on a straight line make's the adjacent angles equal to one another, each of them is a right angle, and the straight line which stands upon the other is called a perpendicular to it ; therefore from the given... | |
 | Euclides - 1814 - 560 σελίδες
...fore the angle AFE is equal b to the angle BFE: But when a straight linestanding upon another makes the adjacent angles equal to one another, each of them is a right 0 angle: Therefore each of the angles AFE, BFE, is a right angle ; wherefore the straight line CD,... | |
 | John Playfair - 1819 - 350 σελίδες
...the angle AFE is equal (8. 1.) to the angle BFE. And when a straight line standing upon another makes the adjacent angles equal to one another, each of them is a right (7. Def. 1.) angle : Therefore each of the angles AF£, BFE is a right angle ; wherefore the straight... | |
 | Euclid, Robert Simson - 1821 - 514 σελίδες
...angle CHG; and they are adjacent angles; but when a straight line standing on a straight line makes the adjacent angles equal to one another, each of them is a Tight angle, and the straight line which stands upon the other is called a perpendicular to it; therefore... | |
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... common to the two triangles AFE, BFE, there are two sides in the one equal to two sides in the other, each to each ; and the base EA is equal to the base EB ; (i. 
