| Euclides - 1816 - 588 pages
...ABC 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 tw*o right angles, these... | |
| John Playfair - Circle-squaring - 1819 - 350 pages
...&c. Q, ED PROP. XIV. THEOR. If, at a point in a straight line, t-sco other straight lines, upon the **opposite sides of it, make the adjacent, angles together...equal to two right angles, these two straight lines** are in one and the same straight line. At the point B in the straight line AB, let the two straight... | |
| John Mason Good - 1819 - 800 pages
...Prop. XIV. Theor. If, at a point in a straight bit, two other straight lines, upon the opposite ¿act **of it, make the adjacent angles together equal to two right angles, these two straight** linei ¿all be in one and ihe .same straight line. I'rop. XV. Theor. If two straight lines cut one... | |
| Peter Nicholson - Mathematics - 1825 - 1046 pages
...ABC are together equal to two right angles. Wherefore, when a straight Kne, &c. QED Proposition 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... | |
| John Playfair - Circle-squaring - 1826 - 326 pages
...together equal to two right angles. \Yherefore, when a straight line, &e. QEJD. . •' PROP. XIV. THEOR. **If, at a point in a straight line, two other straight lines,** upon the opposite sides of it, make the adjaeent angles together equal to two right angles, these two... | |
| Robert Simson - Trigonometry - 1827 - 546 pages
...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... | |
| Pierce Morton - Geometry - 1830 - 584 pages
...Straight lines which pass through the same two points lie in the same straight line . . . m. 4 (A) **If at a point in a straight line two other straight lines** upon opposite sides of it make the adjacent augles together equal to two rifcht angles these two straight... | |
| John Playfair - Euclid's Elements - 1833 - 346 pages
...PROP. XIV. THEOR. If, at a point in a straight line, two other straight lines, upon the oppo. site **sides of it, make the adjacent angles together equal to two right angles, these two straight lines** are in one and the same straight line. At the point B in the straight line AB, let the two straight... | |
| Thomas Perronet Thompson - Euclid's Elements - 1833 - 168 pages
...to two right angles, and those on both sides will be equal to four. PROPOSITION XIII. THEOBEM. — **If, at a point in a straight line, two other straight lines, on** the opposite sides of it, make the adjacent angles together equal to two right angles; those two other... | |
| Euclides - 1834 - 518 pages
...' PROPOSITION XIV. THBOR. — If, at a point in a straight line, two oiher straight lines, upon the **opposite sides of it, make the adjacent angles together equal to two right angles, these** Iwo straight lines shall be in one and the same straight line. At the point B, in the straight line... | |
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