| Euclid, Robert Simson - 1821 - 516 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
...(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 - 372 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
...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 - 513 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 - 516 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 - 186 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 - 272 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
...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 - 513 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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