| Euclid - Geometry - 1810 - 554 pages
...the one side of it, are either two right angles, or are together equal to two right angles. Book I. **Let the straight line AB make with CD, upon one side of it, the angles CBA, ABD;** these are either two right angles, or are together equal to two right angles. For, if the angle CBA... | |
| Euclides - 1816 - 588 pages
...I.. Let the straight line AB make with CD, upon one side v-*"V-' of it, the angles CBA> ABD : these **are either two right angles, or are together equal to two right angles.** • * For if the angle CB A be equal to ABD, each of them is a % A ' E DB D B C 1 Def. 10. right4 angle;... | |
| John Playfair - 1819 - 354 pages
...straight line AB. Which ivas to be done. PROP. XIII. THEOR. The angles which one straight line makes with **another upon one side of it, are either two right...with CD, upon one side of it, the angles CBA, ABD** ; these are either two right angles, or are together equal to.two right angles. For, if the angle CBA... | |
| John Playfair - Circle-squaring - 1819 - 350 pages
...right angles. Let the straight line AB make witK CD, upon one side of it, the angles CBA, 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 is a right angle (Def. 7.) ; but, if not, from... | |
| Euclid, Robert Simson - Geometry - 1821 - 514 pages
...Which was to be done. 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...with CD, upon one side of it, the angles CBA, ABD;** these are either two right angles, or are together equal to two right angles. PROP. XVI. THEOR. IF... | |
| Euclides - 1821 - 294 pages
...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 - Mathematics - 1825 - 1046 pages
...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 - Euclid's Elements - 1826 - 326 pages
...straight line AB. Whieh was to be done, f PROP. XIII. THEOR. The angles whieh one straight 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... | |
| Robert Simson - Trigonometry - 1827 - 546 pages
...straight line AB. 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...with 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... | |
| John Playfair - Geometry - 1829 - 210 pages
...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... | |
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