| Euclid - 1845 - 336 pages
...if a transversal make (i) a pair of alternate angles equal, or (ii) a pair of corresponding angles **equal, or (iii) a pair of interior angles on the same side of the** transversal together equal to two right angles. (i) Let the straight lines AB, CD be cut by the transversal... | |
| Thomas Tate (Mathematical Master, Training College, Battersea.) - 1860 - 404 pages
...intersect, the vertically opposite angles are equal 18 Chapter 4. PARALLEL STRAIGHT LINES 2<, When **a straight line cuts two other straight lines, if (i) a pair of** corresponding angles are equal (p. 21), or (ii) a pair of alternate angles are equal (p. 22), or (iii)... | |
| 480 pages
...four right angles. If two straight lines intersect, the vertically opposite angles are equal. When **a straight line cuts two other straight lines, if (i) a pair of** corresponding angles are equal, or (ii) a pair of alternate angles are equal, or (Hi) a pair of interior... | |
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