| Charles Davison - Geometry, Solid - 1905 - 140 pages
...is perpendicular to the plane X. 20 SOLID GEOMETRY PARALLEL LINES IN DIFFERENT PLANES. 16. PROP. 15. **Straight lines which are parallel to the same straight line are parallel to one another.** L Let AB and CD be both parallel to LM ; to prove that AB is parallel to CD. Let X represent a plane... | |
| University of Calcutta - Universities and colleges - 1907 - 458 pages
...corresponding angles equal, (iii) the interior angles on the same side of the line supplementary, then the **two straight lines are parallel ; and the converse....straight line are parallel to one another. Triangles and** rectilineal figures. The sum of the angles of a triangle is equal to two right angles. If the sides... | |
| University of Allahabad - 1907 - 528 pages
...interior angles on the same side of the cutting line are together equal to two right angles, then the **two straight lines are parallel ; and the converse....the same straight line are parallel to one another.,** TBIANGLES AUD EECTILINBAL FIGUBES. The sum of the angles of a triangle is equal to two right anglesIf... | |
| University of Allahabad - 1908 - 566 pages
...interior angles on the same side of the cutting line are together equal to two right angles, then the **two straight lines are parallel ; and the converse....the same straight line are parallel to one another.** TBIANGLES AND EECTILINEAL FIGUBES. The sum of the angles of a triangle is equal to two right angles.... | |
| Henry Sinclair Hall - 1908 - 286 pages
...PARALLELS ILLUSTRATED BY ROTATION. HYPOTHETICAL CONSTRUCTION ---------- 39 THEOREM 15. [Euc. I. 30.] **Straight lines which are parallel to the same straight line are parallel to one another.** 40 Triangles continued. THEOREM 16. [Euc. I. 32.] The three angles of a triangle are together equal... | |
| University of Allahabad - 1909 - 638 pages
...interior angles on the same side of the cutting line are together equal to two right angles then the **two straight lines are parallel; and the converse....straight line are parallel to one another. TRIANGLES** AWD RECTILINEAL FIGURES. The sum of the angles of a triangle is equal to two right angles. If the sides... | |
| Alexander H. McDougall - Geometry - 1910 - 316 pages
....-. straight lines which are parallel to the same straight line are not intersecting lines, ie : — **Straight lines which are parallel to the same straight line are parallel to** each other. THEOREM 8 If a transversal cuts two parallel straight lines, the alternate angles are equal... | |
| McGill University - 1911 - 178 pages
...interior angles on the same side of the cutting line are together equal to two right angles, then the **two straight lines are parallel ; and the converse....the same straight line are parallel to one another.** The sum of the angles of a triangle is equal to two right angles. If the sides of a convex polygon... | |
| University of Allahabad - 1911 - 726 pages
...interior angles on the sane side of the cutting line are together equal to two right angles, then the **two straight lines are parallel ; and the converse. Straight lines which are** parrallel to the same straight line are parallel to one another. TWANGLES AND RECTILINEAL FIGURES.... | |
| Great Britain. Board of Education - Mathematics - 1912 - 632 pages
...together equal to two right angles, then the two straight lines are parallel ; and the converse. 4. **Straight lines which are parallel to the same straight...to one another. Triangles and Rectilinear Figures.** 5. The sum of the angles of a triangle is equal to two right angles. 6. If the sides of a convex polygon... | |
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