 | 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... | |
 | 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 - 544 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 - 488 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 - 148 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 - 290 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, James Thomson - 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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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. 
