 | Peter Comninos - Computers - 2010 - 556 pages
...congruent (ie equal to one another). 5. If two lines are drawn which intersect a third in such a way that the sum of the two interior angles on the same side of the third line is less than two right angles, then these two lines, if extended infinitely, must intersect... | |
 | New Hampshire College of Agriculture and the Mechanic Arts - 1906 - 432 pages
...rhombus, trapezoid, limit of a variable. 2. If two parallel lines be cut by a third straight line, the sum of the two interior angles on the same side of the secant line is equal to two right angles. Demonstrate. 3. The three bisectors of the three angles... | |
 | Schools - 1893 - 388 pages
...as you did in first set of angles. Theorem 11. When a straight line intersects two parallel lines, the SUM of the two INTERIOR angles on the SAME side of the intersecting line is equal to two right angles. The parallels are represented by the lines 1-2... | |
| |
If two parallel lines are cut by a transversal, the sum of the two interior angles on the same side of the transversal is two right angles. 
