 | Euclides - 1864 - 448 pages
...together equal to two right angles(ax. 1.) Wherefore, when a straight line, &o. QED PROPOSITION XIV. THEOREM. If at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjavent angles together equal to two right angles ; then these... | |
 | Robert Potts - 1865 - 528 pages
...QBD PROPOSITION XIV. THEOREM. lf at a paint in a straight line, two other straight lines, upon tha opposite sides of it, make the adjacent angles together equal to two right angles ; then these two straight lines shall be in one and the same straight line. At the point B in the straight... | |
 | Euclides - 1865 - 80 pages
...straight line, and on the same side of it, are together equal to two right angles. PROPOSITION VI. THEOR. If at a point in a straight line two other straight lines on the opposite sides of it make the adjacent angles together eqnal to two right angles, these two straight... | |
 | Euclides - 1865 - 402 pages
...together equal to two right angles, (ax. 1.) Wherefore when a straight line, &c. QED PROP. XIV.— THEOREM. If, at a point in a straight line, two other straight lines, upon the opposite sides of it, mahe the adjacent angles together equal to two right angles, then these... | |
 | Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 426 pages
...therefore DBA, ABC are together equal to two right angles. Wherefore, the angles &c. QEP PROPOSITION 14. THEOREM. 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 straight... | |
 | Euclid, Isaac Todhunter - Euclid's Elements - 1867 - 424 pages
...therefore DBA, ABC are together equal to two right angles. Wherefore, the angles &c. QED PROPOSITION 14. THEOREM. If, at a point in a straight line, two other straight line*, on the opposite sides of it, make the adjacent angles together equal to two right angles, these... | |
 | Robert Potts - 1868 - 434 pages
...together equal to two right angles, (ax. 1.) Wherefore, when a straight line, &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 rig/it angles ; then... | |
 | Euclides - 1870 - 270 pages
...Recap. PROP. 14.— THEOB. If at a point in a st. line, two other lines, upon ike opposite sides oj it, make the adjacent angles together equal to two right angles, these two lines shall be in one and the same Line. CONS. — Pst. 2. A straight line may be produced to any length... | |
 | Henry William Watson - Geometry - 1871 - 320 pages
...that die angle AEC is equal to the angle BED. PROPOSITION 13. If at a point in a straight line two straight lines on opposite sides of it make the adjacent angles together equal to two right angles, or make the vertically opposite angles equal to one another, these two straight lines shall be in one... | |
 | Elias Loomis - Geometry - 1871 - 302 pages
...equal to that of ihe two adjacent angles BAD, DAF B~ PROPOSITION in. THEOREM (Converse of Prop. II.). If, at a point in a straight line, two other straight lines, upon me 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. 
