 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.  A course of geometrical drawing - Page 2by William Schofield Binns - 1861Full view - About this book
 | Robert Potts - Geometry - 1876 - 446 pages
...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...stands on the other is called a perpendicular to it. XL •An obtuse angle is that which is greater than a right angle. xn. An acute angle is that which... | |
 | Richard Wormell - 1876 - 268 pages
...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 said to be perpendicular to it. 19. When one straight line meeting another straight line makes the... | |
 | Edward Atkins - 1877 - 72 pages
...only one angle at any given point, it may be expressed by the letter at that point, as the angle K 10. "When a straight line standing on another straight...stands on the other is called a perpendicular to it. 1 1 . An obtuse angle is that which is greater than a right angle. 12. An acute angle is that which... | |
 | Isaac Todhunter - Philosophy - 1877 - 452 pages
...said to be perpendicular to the other. This is put into a more precise form in the following manner: when a straight line standing on another straight...stands on the other is called a perpendicular to it. Thus in the figure if the angle ABC is equal to the angle ABD each of them is a right angle, and AB... | |
 | Euclides - 1877 - 58 pages
...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 said to be perpendicular to it. 10. A plane figure is that which is inclosed by one or more lines.... | |
 | Āryabhaṭa - 1878 - 100 pages
...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...stands on the other is called a perpendicular to it. XVII. An obtuse angle is that which is greater than a right angle. And an acute angle is that which... | |
 | Euclides - 1879 - 146 pages
...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...stands on the other is called a perpendicular to it. 11. An obtuse angle is that which is greater than a right angle. la. An acute angle is that which is... | |
 | Isaac Sharpless - Geometry - 1879 - 282 pages
...line standing on another straight line makes the adjacent angles equal to each other, each of them is called a right angle, and the straight line which stands on the other is called a perpendicular. 9. An obtuse 1 angle is one that is greater than a right angle. 10. An acute * angle is one that is... | |
 | Moffatt and Paige - 1879 - 428 pages
...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 upon the other is called a perpendicular to it (Def. 10). Therefore, from the given point C a perpendicular... | |
 | Isaac Todhunter - Euclid's Elements - 1880 - 426 pages
...[Definition 15. therefore the angle CHF is equal to the angle CHG ; [I. 8. and they are adjacent angles. But when a straight line, standing on another straight...stands on the other is called a perpendicular to it. [Def. 10. Wherefore a perpendicular CH has been drawn to the given straight line AB from the given... | |
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