 | John Mason Good - 1819 - 800 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
...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,...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
...angle ADG is equal (8. 1.) to the angle GDB : 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 : (Ю. Def. 1 .) Therefore the angle GDB is a right angle. But FDB is likewise a right... | |
 | George Lees - 1826 - 276 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,... | |
 | Euclides - 1826 - 226 pages
...are right lines, it is called a rectilineal angle. 10. When a right line standing on another right line, makes the adjacent angles equal to one another, each of the equal angles is a right angle, and the right Tine standing on the other is called a perpendicular.... | |
 | Euclid - 1826 - 234 pages
...are right lines, it is called a rectilineal angle. 10. When a right line standing on another right line, makes the adjacent angles equal to one another, each of the equal angles is a right angle, and the right line standing on the other is called a perpendicular.... | |
 | Robert Simson - Trigonometry - 1827 - 546 pages
...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,...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... | |
 | Thomas Curtis - Aeronautics - 1829 - 814 pages
...the angle contained by the line С В and DB. 7. When a straight line standing on another straight line makes the adjacent angles equal to one another,...which stands on the other is called a PERPENDICULAR. Fig. 4. 8. An OBTUSE ANGLE is that which is greater than a right angle. Fig. 5. 9. An ACUTE ANGLE is... | |
 | John Playfair - Geometry - 1829 - 210 pages
...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...stands on the other is called a perpendicular to it. Otherwise. When a straight line standing on another straight line does not incline to either side of... | |
 | James Charlton - Geography - 1829 - 250 pages
....,; . l 5tn"A f itei,*& i theinc!ination or opening -of two angles is called a RIGHT ANGLE ; and the line which stands on the other, is called a PERPENDICULAR to it. •• • > i •••••• i OF THE TERRESTRIAL •'CLdME.'"' 28. The TERRESTRIAL GLOBE is an... | |
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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. 
