 | 1886 - 548 Seiten
...equivalence of the three forms of the parallel-axiom mentioned in my paper. Form (a), (Euclid's) is: — "If a straight line meets two straight lines, so as...the angles which are less than two right angles." In other words, if the angle CAH + the angle ABD < 180°, then AC and />' l> will at length meet. This... | |
 | Irving M. Copi - 1954 - 402 Seiten
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 | Irving M. Copi - 1954 - 382 Seiten
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 | Roberto Bonola - 1955 - 452 Seiten
...make equal alternate angles, he hrings m the unwieldly postulate or axiom: " If a straight line meet two straight lines, so as to make the two interior...less than two right angles, these straight lines, heing continually produced, shall at length meet on that side on which are the angles which are less... | |
 | Will Schutz - 1958 - 296 Seiten
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If a straight line meets two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles... 
