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. Euclid - Page 31by Euclid, Rupert Deakin - 1903 - 164 pagesFull view - About this book
| Euclides - Geometry - 1841 - 378 pages
...therefore DBA, ABC are together equal to two right angles. Wherefore, the angles, &c. QED 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... | |
| Euclides - 1842 - 320 pages
...any number of lines meeting in one point, are together equal to four right angles. PROP. XIV. THEOR. **straight lines shall be in one and the same straight line. At the point** в in the straight line AB, let the two straight lines вc, BD upon the opposite sides of AB make the... | |
| John Playfair - Euclid's Elements - 1842 - 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 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... | |
| Euclides - 1845 - 544 pages
...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 - 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.... | |
| Euclid, John Playfair - Euclid's Elements - 1846 - 332 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... | |
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