| William Ezra Worthen - 1857 - 410 sider
...letter placed at that point ; as the angle at E.' When a straight line standing on another straight **line makes the adjacent angles equal to one another, each of the angles is called a** rig fit angle ; and the straight lines are said to be perpendicular to each other (fig. 3). An obtuse... | |
| Euclides - 1860
...DBC may be called angle n ; and ABD, angle m. 11. 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. 12. The two adjacent angles... | |
| Isaac Todhunter - 1860
...meet together, but are not in the same straight line. And when a straight line standing on another **makes the adjacent angles equal to one another, each of the angles is called a right angle.** A right angle is divided into 90 equal parts called degrees, a degree is divided into 60 equal parts... | |
| Robert Potts - 1860 - 361 sider
...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 a right... | |
| William Schofield Binns - 1861
...meeting or cutting each other in a point, as c (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 to it." The angles AB c, ABD, are... | |
| Euclides - 1862
...ECF; (I. 8.) And they are adjacent angles. 5. 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;** (def. 10.) 6. Therefore each of the angles DCF, ECF, is a right angle. Conclusion. — Therefore from... | |
| Euclides - 1862
...ADG must be equal to the angle GDB ; (L, 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 must be a right angle ; but FOB is a right angle;... | |
| Euclides - 1864
...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 a right... | |
| Euclides - 1865
...ECF; (i. 8) 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 the angles is called a right angle** ;' (def. 10) therefore each of the angles DCF, ECF, is a right angle. Wherefore, from the point C,... | |
| Euclid, Isaac Todhunter - 1867 - 400 sider
...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 the angle BDF is also a right angle.... | |
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