| 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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