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
| John Playfair - Euclid's Elements - 1806 - 320 pages
...angle at a point, it may be expressed ' by a letter placed at that point ; as the angle at E.' VII. **When a straight line standing on another straight...stands on the other is called a perpendicular to it.** _____ VIII, Book I. An obtuse angle is that which is greater than a right angle. IX. An acute angle... | |
| Robert Simson - Trigonometry - 1806 - 546 pages
...placed at that point; as < the angle at E.' X. When a straight line standing on another straight lii>e **makes the adjacent angles equal to one another, each...stands on the other is called a perpendicular to it.** XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which... | |
| John Mason Good - 1813 - 722 pages
...of two straight lines to or.e another, which meet together, but are not in the same straight line. **10. When a straight line standing on another straight...stands on the other is called a perpendicular to it.** 11. An obtuse an¿le is that which is greater 'than a right angle. IS. An acnte angle is that which... | |
| Euclides - 1814 - 558 pages
...one angle at a point, it may be ex' pressed by a letter placed at that point; as the angle at E.' X. **When a straight line standing on another straight...stands on the other is called a perpendicular to it.** XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which... | |
| John Playfair - 1819 - 354 pages
...one angle at a point, it may be expressed by a letter placed at that point ; as the angle at E.' VII. **When a straight line standing on another straight...stands on the other is called a perpendicular to it.** VIII. An obtuse angle is that which is greater than a right angle. An acute angle is that which is... | |
| John Mason Good - 1819 - 740 pages
...adjacent angles equal to one another, each of (lie angles is called и right angle; and the ira glu **line which stands on the other is called a perpendicular to it.** 11. An obtuse angle is that which is g cater than a right an^le. 12. Ли acute angle is that which... | |
| Euclid, Robert Simson - Geometry - 1821 - 514 pages
...angle at ' a point, it may be expressed by the letter placed at that point; ' as the angle at E.' X. **When a straight line standing on another straight...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. An acute angle... | |
| Peter Nicholson - Mathematics - 1825 - 1046 pages
...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...stands on the other is called a perpendicular to it.** 11. An obtuse angle is that which is greater than a right angle. ^ 12. An acute angle is that which... | |
| George Lees - 1826 - 266 pages
...When a straight line AB, standing on another straight line CD, makes the adjacent angles ABC and ABD **equal to one another, each of the angles is called...stands on the other, is called a perpendicular to it.** •D OF GEOMETRY. with another CD, upon one side of it, are eitlier two right angles, or are, together,... | |
| Robert Simson - Trigonometry - 1827 - 546 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...stands on the other is called a perpendicular to it.** XL An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which is... | |
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