| Euclides - 1845 - 546 pages
...together equal to two right angles, (ax. 1.) Wherefore when a straight line, &c. QE ». 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... | |
| Euclid, James Thomson - Geometry - 1845 - 380 pages
...it but BD, which therefore is in the same straight line with CB. Wherefore, if at a point, &c. Cor. **If, at a point in a straight line, two other straight lines** meet on the opposite sides of it, and make equal angles with the parts of it on opposite sides of the... | |
| Euclid - Geometry - 1845 - 218 pages
...together equal to two right angles. Wherefore, when a straight line, &c. QED PROPOSITION 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... | |
| Great Britain. Committee on Education - Education - 1846 - 434 pages
...- 12 "" IS 8. " Prove that if at a point in a given 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** are in one and the same straight line." 9. The wages of a servant were 40/. yearly and a suit of livery.... | |
| Great Britain. Council on Education - Education - 1846 - 474 pages
...- 12 18 8. " Prove that if at a point in a given straight line two other strain-lit lines upon the **opposite sides of it make the adjacent angles together...equal to two right angles, these two straight lines** are in one and the same straight line." 9. The wages of a servant were 40Z. yearly and a suit of livery.... | |
| John Playfair - Euclid's Elements - 1846 - 334 pages
...angles DBA, ABC. PROP. XIV. THEOR. //, 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** are in one and the same straight line. At the point B in the straight line AB, let the two straight... | |
| Euclides - 1846 - 292 pages
...to two right angles. Wherefore, The angles, which one straight line %c. <t. i:.j>. 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... | |
| Great Britain. Admiralty - Geometry - 1846 - 130 pages
...rt. /.s, .-. /. DBA + L ABC = 2 rt. L s. Ax K Therefore the angles, &c. PROP. XIII. THEOR. 14. 1 Eu. **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... | |
| Great Britain. Admiralty - Geometry - 1846 - 130 pages
.../_», .'. Z DBA + L ABC = 2 rt. L s. Ax ' '• Therefore the angles, &c. PROP. XIII. THEOR. 14. 1 Eu. **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... | |
| Euclides - 1847 - 128 pages
....'.remaining / DBC = remaining L ECB : ie L* below the base are =.— QED PROP. XIV. THEOR. GEN. ENUN. — **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... | |
| |