Bisecting a Line Segment with a Ruler Given a Parallel Line
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Suppose the segment lies on the line and that a line is parallel to .
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Contributed by: Izidor Hafner (August 2017)
Open content licensed under CC BY-NC-SA
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The construction is valid by "The Trapezoid Theorem" [2, p. 73].
References
[1] B. I. Argunov and M. B. Balk, Elementary Geometry (in Russian), Moscow: Prosveščenie, 1966 p. 337.
[2] G. E. Martin, Geometric Constructions, New York: Springer, 1998.
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