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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...
The Elements of Euclid [book 1] for beginners, by J. Lowres - Page 10
by Euclides - 1852
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## George Boole: Selected Manuscripts on Logic and its Philosophy

Ivor Grattan-Guinness, Gerard Bornet - Mathematics - 1997 - 310 pages
...that all right angles are equal to one another. 5. And that if a straight line meet two other straight lines so as to make the two interior angles on the...it taken together less than two right angles these straight lines being continually produced shall meet on that side on which are the angles which are...
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## Transactions and Proceedings of the New Zealand Institute, Volume 18

New Zealand Institute - Science - 1886 - 532 pages
...parallel-axiom mentioned in my paper. Form (a), (Euclid's) is : — " If a straight line meets two straight lines, so as to make the two interior angles on the...it taken together less than two right angles, these straight lines being I continually produced shall at length meet upon that side on which are the angles...
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## The American Mathematical Monthly: Devoted to the Interests of ..., Volumes 3-4

Mathematicians - 1896 - 742 pages
...angles AKH and CfJK equal to two right angles. QED PROPOSITION XI. If a straight line meet two straight lines so as to make the two interior angles on the same side of it taken tdgethcr less than two light angles, these straight lines, being continually produced, shall at length...
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## A Short Hstory of of Greek Mathematics

James Gow - 380 pages
...lines cannot enclose a space: 11. All right angles are equal: 12. If a straight line meet two straight lines, so as to make the two interior angles on the same side of it together less than two right angles, these straight lines will meet if produced on that side. Of these...
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