 If two lines are cut by a third, and the sum of the interior angles on the same side of the cutting line is less than two right angles, the lines will meet on that side when sufficiently produced.  New Plane Geometry - Page 35by Webster Wells - 1908 - 298 pagesFull view - About this book
 | V Krishnamurthy, C R Pranesachar - Mathematics - 2007 - 708 pages
...cut by a transversal then 1 . the alternate angles are equal 2. the corresponding angles are equal 3. the sum of the interior angles on the same side of the transversal is equal to 180°. Fig. 35 K _. HA/5 Fig. 36 Proof In Fig. 36, AB II CD and the transversal EF cuts AB and CD at... | |
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