 | Moffatt and Paige - 1879 - 428 σελίδες
...to the angle ECF (I. 8), and these are adjacent angles. But when a straight line standing on another straight line makes the adjacent angles equal to one another, each of these angles is called a right angle (Def. 10). Therefore each of the angles DCF, ECF is a right angle,... | |
 | Euclides - 1879 - 146 σελίδες
...the lines meet is often called the vertex of the angle.] 10. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of these angles is called a right angle ; and the straight line which stands on the other is called a... | |
 | Isaac Todhunter - 1880 - 426 σελίδες
...therefore the angle ADG is equal to the angle BDG. [I. 8. But 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 ; [I. Definition 10. therefore the angle BDG is a right angle. But... | |
 | T S. Taylor - 1880 - 152 σελίδες
...DEFINITION OF RIGHT ANGLES. JTigr.J. Euc. Def. io.) — 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 -A. -0 .*... | |
 | Euclides - 1881 - 236 σελίδες
...(I. &) to the angle CHG ; and they are adjacent angles. But when a straight line standing on another straight line makes the adjacent angles equal to one...each of them is a right angle, and the straight line wliich stands upon the other is called a perpendicular (Def. 10) to it. Therefore from the given point... | |
 | Marianne Nops - 1882 - 278 σελίδες
...acutus, sharp). These are thus defined by Euclid : — 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... | |
 | Euclid, Isaac Todhunter - 1883 - 428 σελίδες
...therefore the angle AFE is equal to the angle BFE. [I. 8. But 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 ; [I. Definition 10. therefore each of the angles AFE, BFE is a... | |
 | Euclides - 1883 - 176 σελίδες
...and .-. L DCF = L ECF, and these are adjacent angles. But 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. .-. CF is at right angles to AB, and is drawn from the given point... | |
 | Euclides - 1884 - 94 σελίδες
...is equal to the angle ; and these are adjacent angles. But when a straight line standing on another straight line, makes the adjacent angles equal to...perpendicular to it. Therefore from the given point , a perpendicular has been drawn to the given straight line RELFE BROTHERS' EUCLID SHEETS. PROPOSITIONS... | |
 | Stewart W. and co - 1884 - 272 σελίδες
...angle is named from three or one letters, as ABC or B. 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... | |
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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. 
