 | Euclid, John Playfair - Euclid's Elements - 1846 - 334 pages
...equal (8. 1.) to the angle CHG ; and they are adjacent angles ; now when a straight line standing on a straight line makes 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... | |
 | Euclides - 1847 - 128 pages
...Definition 18. 10. When a straight line, standing on another straight line, makes the adjacent an. gles equal to one another, each of the angles is called...and the straight line which stands on the other is called a perpendicular to it. 11. An obtuse angle is that which is greater than a right angle. 12.... | |
 | Euclides - 1848 - 52 pages
...line standing on another straight line, makes the adjacent angles equal to each other, each of these angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it. XI. An obtuse angle is that which is greater than a right angle. XII.... | |
 | Charles Richson - 1848 - 98 pages
...line standing on another straight line makes the adjacent angles equal to each other, each of these angles is called a right angle; and the straight line which stands on the other is called & perpendicular to it." QUESTION upon these definitions, if given. 27 II. — To draw four right... | |
 | Elias Loomis - Conic sections - 1849 - 252 pages
...the angle ECD is the difference between the two angles BCD, BCE. 10. When a straight line, meeting another straight line, makes the adjacent angles equal to one another, each of them is called a right angle, and the straight line which meets the other is called a perpendicular... | |
 | Euclid, Thomas Tate - 1849 - 120 pages
...equal (i. 8.) to the 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 right angle, and the straight line which stands upon the other is called a perpendicular... | |
 | Janet Taylor - Nautical astronomy - 1851 - 674 pages
...compass, cut off from the circle by the lines which form the angle. When a straight line standing on another straight line makes the adjacent angles equal...and the straight line which stands on the other is called a perpendicular to it : thus the line AC is perpendicular to DB, and makes with it the two adjacent... | |
 | Sir Henry Edward Landor Thuillier - Surveying - 1851 - 826 pages
...another, which meet together, but are not in the same straight line.* When a straight line standing upon another straight line makes the adjacent angles equal to one another, each of them is called a right angle, and the straight line which stands upon the other is called a perpendicular... | |
 | Euclides - 1852 - 152 pages
...is equal d to the 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 right angle; and the straight line which stands upon the other is called a perpendicular... | |
 | Euclides - 1853 - 146 pages
...angle CHF is equal 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 another, each of them is a right angle, and the straight line which stands upon the other is called a perpendicular... | |
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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. 
