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. An Elementary Geometry - Page 5by William Frothingham Bradbury - 1873 - 110 pagesFull view - About this book
| Robert Simson - Trigonometry - 1806 - 546 pages
...are together equal to two right angles. Wherefore, when a straight line, fcc. 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 straight... | |
| John Playfair - Mathematics - 1806 - 320 pages
...together equal to two right angles. Wherefore, when a straight line, &c. C£. ED 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 straight... | |
| John Mason Good - 1813 - 714 pages
...siile of it, are either two right angles, or are together rqual to two right angles. Prop. XIV. Tlieor. **If, at a point in a straight line, two other straight lines, upon** the opposite iidrs of it, make the adjacent angles together equal to t«-o right angles, these two... | |
| 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 two straight... | |
| 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 lines, upon** the opposite sides of it, make the adjacent angles, together equal to two right angles, these two straight... | |
| 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... | |
| 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 straight... | |
| 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 lines shall be in one and the... | |
| 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... | |
| Mathematics - 1835 - 684 pages
...Straight lines which pass through the same two points lie in the same straight line . . . ax. 4 (J>) **If at a point in a straight line two other straight lines upon opposite sides of it make the** adjacent angles together equal to two right angles, these two straight unes shall be in one and the... | |
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