| United States. Office of Education - Agricultural colleges - 1915 - 1296 pages
...straight lines intersect, the vertically opposite angles are equal. Parallel straight lines. — When **a straight line cuts two other straight lines, if...line are together equal to two right angles, then** tha two straight lines are parallel; and the converse. Straight lines which are parallel to the same... | |
| Edson Homer Taylor - Mathematics - 1915 - 552 pages
...straight lines intersect, the vertically opposite angles are equal. Parallel straight lines. — When **a straight line cuts two other straight lines, if...line are together equal to two right angles, then** tha two straight lines are parallel; and the converse. Straight lines which are parallel to the same... | |
| University of Allahabad - 1916 - 830 pages
...a pair of alternate angles are equal, or («») a pair of corresponding angles are equal, or (tït) **a pair of interior angles on the same side of the...right angles, then the two straight lines are parallel** ; and the converse. Straight lines which are parallel to the same straight line are parallel to one... | |
| University of Allahabad - 1918 - 888 pages
...or at (it) a pair of corresponding angles are equal, or (iti) a pair of interior angles on the ssme **side of the cutting line are together equal to two right angles, then the two straight** lilies are parallel ; and the converse. Straight lines which are parallel to the same straight line... | |
| Teachers - 1923 - 264 pages
...straight lines intersect, the vertically opposite angles are equal. Parallel Straight Lines. — When **a straight line cuts two other straight lines if —...right angles, then the two straight lines are parallel** ; and the converse. Straight lines which are parallel to the same straight line are parallel to one... | |
| Julius J. H. Hayn - Geometry, Plane - 1925 - 328 pages
...to indirect method. Exercises Group 27 70. Prop. XVIII. If two lines are cut by a third line, making **a pair of interior angles on the same side of the cutting line** supplementary, the two lines are parallel. 69. Prop. XVII. Two lines perpendicular to the same line... | |
| University of Bombay - 1906 - 956 pages
...two straight lines intersect, the vertically opposite angles are equal. Parallel Straight Lines. When **a straight line cuts two other straight lines, if...(ii) a pair of corresponding angles are equal, or** (iii)a pair of interior angles on the same siue of the cutting line are together equal to two right... | |
| University of Oxford - Universities and colleges - 1913 - 386 pages
...two straight lines intersect, the vertically opposite angles are equal. Parallel Straight Lines. When **a straight line cuts two other straight lines, if...(ii) a pair of corresponding angles are equal, or** (Hi) a pair of interior angles on the same side of the cutting line are together equal to two right... | |
| 934 pages
...other straight lines such that (i) a pair of corresponding angles are equal (ii) a pair of alternate **angles are equal or (iii) a pair of interior angles on the same side of the cutting line,** together equal to two right angles, the straight lines are parallel 4. Straight lines that are parallel... | |
| University of Bombay - 1904 - 1174 pages
...two straight lines intersect, the vertically opposite angles are equal. Parallel Straight Linea. When **a straight line cuts two other straight lines, if...right angles, then the two straight lines are parallel** ; and the converse. Straight lines which arc parallel to the same straight line are parallel to one... | |
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