| Thomas Perronet Thompson - Euclid's Elements - 1833 - 150 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... | |
| Euclides - 1834 - 518 pages
...one straight line, &c. QED ' PROPOSITION XIV. THBOR. — If, at a point in a straight line, two oiher **straight lines, upon the opposite sides of it, make...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... | |
| Euclid - 1835 - 540 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...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... | |
| Robert Simson - Trigonometry - 1835 - 513 pages
...Wherefore, " when a straight line," &c. QED PROP. XIV. THEOR. If , at a point in a straight line, tu.o **other straight lines upon the opposite sides of it,...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... | |
| 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... | |
| Mathematics - 1836 - 472 pages
...another upon one side of it, are either two right angles, or are together equal to two right angles. XIV. **If, at a point in a straight line, two other straight lines, upon the** op. posite sides of it, make the adjacent angles together equal to two right angles, these two straight... | |
| John Playfair - Geometry - 1836 - 114 pages
...makes with another on the same side of it, are together equal to two right angles. PROP. II. THEOR. **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, these two... | |
| John Playfair - Geometry - 1837 - 332 pages
...angles ; because their sum is equal to that of the two adjacent angles DBA, ABC. 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... | |
| Andrew Bell - Euclid's Elements - 1837 - 240 pages
...angles, are equal to one another ; that is, x = m-\-nx = two right angles. PROPOSITION XIY. THEOREM. **If, at a point in a straight line, two other straight...equal to two right angles, these two straight lines** shiill be in one and the same straight line. At the point B in the straight line AB, let the two straight... | |
| Euclid - Geometry - 1837 - 410 pages
...any number of lines meeting in one point, are together equal to four right angles. PROP. XIV. THEOR. **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, these two... | |
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