 | Euclid, Robert Simson - 1821 - 514 sider
...PROP. XIII. THEOR. THE angles which one straight line makes with another upon the one side of it, are either two right angles, or are together equal to...angles, or are together equal to two right angles. PROP. XVI. THEOR. IF one side of a triangle be produced, the exterior angle is greater than either... | |
 | Euclides - 1821 - 294 sider
...(per 8th ) PROP. 13, THEOR. WTten a right line standing upon another makes angles with it, they are either two right angles or are together equal to two right angles, If the right line standing on the other be perpendicular to it, the angles are both right ; if not,... | |
 | Peter Nicholson - 1825 - 1046 sider
...are either two right angles, orare together equal to two right angles. angles СВЛ, ABD ; these are either two right angles, or are together equal to two right angles. For if the angle CBA be equal to ABD, each of them i« a right (Def. 10.) angle ; but; if not',' from... | |
 | George Lees - 1826 - 276 sider
...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, equal to two right angles. For, if AB be perpendicular to CD, then each of the angles ABC, ABD, is a right angle ; and, therefore, are,... | |
 | Robert Simson - 1827 - 546 sider
...dbne. PROP. XIII. THEOR. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to...CD, upon one side of it, the angles CBA, ABD: these shall either be two right angles, or shall together be equal to two right angles. For if the angle... | |
 | Euclid, Robert Simson - 1829 - 548 sider
...PROP. XIII. THEOR. THE angles which one straight line makes with another upon the one side of it, are either two right angles, or are together equal to...angles CBA, ABD ; these are either two right angles, of are together equal to two right angles. For, if the angle CBA be equal to ABD, each of them is a... | |
 | John Playfair - 1829 - 210 sider
...PROPOSITION XIII. THEOREM. The two angles which one straight line makes with another, on one side of it, are together equal to two right angles* Let the straight line AB make with CD, on one side of CD, the angles ABC, ABD; these are together equal to two right angles. r D B £T B G... | |
 | Pierce Morton - 1830 - 584 sider
...Triangles. ' PROP. 8. The angles which one spherical arc make* with another upon one fide of it are either two right angles, or are together equal to two right angles. See the Demonstration of Book I. Prop. 2. Cor. 1 . If two spherical arcs cut one another, the vertical... | |
 | Euclides - 1834 - 518 sider
...PROPOSITION XIII. THEOR. — The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to...CD, upon one side of it, the angles CBA, ABD : these shall either be two right angles, or shall together be equal to two right angles. For if the angle... | |
 | Robert Simson - 1835 - 544 sider
...PROP. XIII. THEOR. The angles which one straight line makes with another upon the one side of it, are either two right angles, or are together equal to...the straight line AB make with CD, upon one side of Book I. it, the angles CBA, ABD; these are either two right angles, v— -v*-' or are together equal... | |
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The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make with CD, upon one side of it, the angles CBA, ABD : these shall either be... 
