 | Euclides - 1848 - 52 sider
...of two straight lines to one another, which meet together, but are not in the same straight line. X. When a straight line standing on another straight...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... | |
 | Charles Richson - 1848 - 98 sider
...two straight lines to one another, which meet together, but are not in the same straight line." 2. "When a straight line standing on another straight...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... | |
 | Euclid, Thomas Tate - 1849 - 120 sider
...one angle at a point, it may be expressed by a letter placed at that point; as the ;ingle at E." ' 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... | |
 | Charles Davies - 1849 - 372 sider
...When a straight line AB meets another straight line CD, so as to make the adjacent angles BAC, BAD, equal to each other, each of these angles is called a right angle ; and the line AB is said to be perpendicular to CD. = 11. Every angle BAC, less than a 1 right angle,... | |
 | Janet Taylor - 1851 - 674 sider
...points and quarter-points of the 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 to one another, each of the angles is called a right angle, and the straight line which stands on the... | |
 | Euclides - 1852 - 152 sider
...shall coincide with A. Observe that DE will fall nearer to AC or EF than BA does.] B 2 BOOK I. BOOK I. 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... | |
 | Royal Military Academy, Woolwich - 1853 - 400 sider
...only one angle at a point, it may be expressed by a letter placed at that point : as the angle at E. 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... | |
 | Euclides - 1853 - 146 sider
...CG; therefore (I. 8.) 3. The 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... | |
 | Euclides - 1853 - 176 sider
...one angle at a point, it may be expressed by a letter placed at that point ; as the angle at e. 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 rigM angle ; and the straight line which stands on the... | |
 | Euclides - 1855 - 270 sider
...is put in inverted commas, as being Dr. Simson's addition ; it is very necessary to be remembered. X 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... | |
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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. 
