 | 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...and the same straight line. • At the point B in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the adjacent... | |
 | John Playfair - 1819 - 354 pages
...Wherefore, .when a straight line, &c. Q, ED PROP. XIV. THEOR. If, at a point in a straight line, too other straight lines, upon the -opposite sides of...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 - 740 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... | |
 | John Playfair - Circle-squaring - 1819 - 350 pages
...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 lines BC, BD upon the opposite sides of AB, make the adjacent... | |
 | Peter Nicholson - Mathematics - 1825 - 1046 pages
...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...be in one and the same straight line. At the point В in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the... | |
 | 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 straight lines are in one and the same... | |
 | 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...one and the same straight line. At the point B in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the adjacent... | |
 | 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 - 1832 - 358 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...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 Playfair - Euclid's Elements - 1833 - 346 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 oppo. site sides of it, make the adjacent angles together equal to two right angles, these two straight... | |
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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 straight lines shall be in one and the same straight line. 
