The elements of Euclid for the use of schools and colleges : books I., II., III. (1876)
Todhunter, I. (Isaac), 1820-1884 · Toronto : Copp, Clark · leaf 39
be parallel to CD. Let the straight line OHKc\xt AB, EF,CD. Then, because QHK cutsthe parallel straight lines AB,EF. the angle AGH is equalLo the angle GHF. [L 29.Again, because GK cutsthe parallel straight lines EF.CD, the angle GHF is equalto the angle GKD. [I. 29.And it was shewn that theangle… … PROPOSITION 31. PROBLEM. To draw a straight line through a given point parallelto a given straight line. Let A be the given point, and BC the given straightline : it is required to draw a straight line through thepoint A parallel to the straight line BC. In BC take any pointD, and join AD ; at…
Geometry · Euclid's Elements · Mathematics, Greek
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