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 Weston school manual - Page 31by Colin Arrott R. Browning - 1884Full view - About this book
| Sir Henry Edward Landor Thuillier - Surveying - 1851 - 826 pages
...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 to it If an angle is not right it is called oblique.... | |
| Euclides - 1852 - 152 pages
...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... | |
| Euclides - Geometry - 1853 - 176 pages
...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... | |
| Royal Military Academy, Woolwich - Mathematics - 1853 - 400 pages
...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... | |
| Euclides - 1853 - 146 pages
...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... | |
| Euclides - 1855 - 270 pages
...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... | |
| Euclides - 1856 - 168 pages
...on the point of intersection between the straight lines or arms of the angle. XV. — RIGHT ANGLE. When a straight line standing on another straight line makes the adjacent angles equal to each other, each of the angles is called a right angle, and the straight line which stands on the... | |
| Robert Rawson - 1856 - 178 pages
...only one angle at a point, it may be expressed by a 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 right angle ; and the straight line which stands on... | |
| William Ezra Worthen - Architectural drawing - 1857 - 650 pages
...only one angle at a point, it may be expressed by a 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 right angle ; and the straight lines are said to be... | |
| W.E. WORTHEN - 1857 - 600 pages
...only one angle at a point, it may be expressed by a 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 right angle; and the straight lines are said to be perpendicular... | |
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