| Euclides - 1848 - 52 pages
...one side of it, are either two right angles, or are together equal to two right angles. PROP. XIV. **THEOREM. If, at a point in a straight line, two other straight lines,** upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two... | |
| Euclid, Thomas Tate - 1849 - 120 pages
...are together equal to two right angles. Wherefore, when a straight line, &c. QED PROP. XIV. THEOR. **If, at a point in a straight line, two other straight lines,** upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two... | |
| Elias Loomis - Conic sections - 1849 - 252 pages
...equal to that of the two adjacent angles BAD, DAF. PROPOSITION HI. THEOREM (Converse of Prop. II.). **If, at a point in a straight line, two other straight lines,** upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two... | |
| Education - 1851 - 502 pages
...SECTION I.—1. If at a point in a 'given straight line, two other straight lines on the opposite side **of it make the adjacent angles together equal to two right angles, these** straight lines are in one and the same straight line. 3. Upon a given straight line to describe a segment... | |
| Popular educator - 1852 - 842 pages
...<.••»<//'•» on op/write tidet of it, or the two angles on the tame tick, of it. either two right angles, or **together equal to two right angles, these two straight lines shall be** either in' the same ttraight line, or shall coincide with each other. It will be a useful exercise... | |
| Euclides - 1853 - 146 pages
...together equal to two right angles. Wherefore, the angles which one straight line, &c. QED PROP. XIV. **THEOREM. If at a point in a straight line, two other straight lines,** upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two... | |
| Euclides - Geometry - 1853 - 334 pages
...right angles, or are together equal to two right angles. Which was to be proved. PEOP. XIV. THEOE. **If at a point in a straight line, two other straight lines, on** the opposite sides of it, make with it the adjacent angles together equal to two right angles: then... | |
| Royal Military Academy, Woolwich - Mathematics - 1853 - 400 pages
...together equal to two right angles. Wherefore, when a straight line, etc. QED PROPOSITION XIV. THEOR. **If, at a point in a straight line, two other straight lines,** upon the opposite side of it, make the adjacent angles together equal to two right angles, these two... | |
| John Playfair - Geometry - 1855 - 334 pages
...angles DBA, ABC. PROP. XIV. THEOR. If, at a point in a straight line, two other straight lines, upon the **opposite sides of it, make the adjacent angles together equal to two right angles, these** ttOo straight lines are in one and the same straight line. At the point B in the straight line AB,... | |
| Euclides - 1855 - 262 pages
...angle and its supplement be bisected, the bisecting lines are perpendicular to each other. PROP. XIV. **THEOREM. If, at a point in a straight line, two other straight lines,** upon the opposite sides of it, make the two adjacent angles together equal to two right angles, these... | |
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