 | Euclides - 1821 - 294 sider
...former (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
...it, 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... | |
 | Euclid, John Playfair - 1826 - 326 sider
...line makes with another upon one side of it, are either two right angles, or are to^ gether equal tq two right angles. Let the straight line AB make with CD, upon one side of it the angles CB A, ABD 5 these are either two right angles, or are together equal to two right angles. For, if the... | |
 | Robert Simson - 1827 - 546 sider
...Which was to be 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...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... | |
 | 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
...Spherical 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... | |
 | John Playfair - 1832 - 358 sider
...Which was to be done. PROP. XIII. THEOR. The angles ichich one straight line makes with another upon one side of it, are either two right angles, or are...angles, or are together equal to two right angles. For, if the angle CBA be equal to ABD, each of them is a right angle (Def. 7. );Dut, if not, from the... | |
 | John Playfair - 1833 - 346 sider
...to be done. PROP. XIII. THEOR. The angles which one straight line makes with another upon one tide of it, are either two right angles, or are together...angles, or are together equal to two right angles. For, if the angle CBA be equal to ABD, each of them is a right angle (Def. 7.) ; but, if not, from... | |
 | Euclid - 1835 - 540 sider
...standing on a 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...angles, or are together equal to two right angles. E i. eS. 1. Let the straight line AB make with CD, upon one side of Book I. it, the angles CBA, ABD... | |
 | 1835 - 684 sider
...2. — Of Spherical Triangles, PROP. 8. The angles. which one spherical arc makes with another upon one side 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... | |
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The angles which one straight line makes with another upon one tide 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 are either two right... 
