Varignon's theorem: Difference between revisions

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Proof: Formatted list as list in image caption
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m Open access bot: doi added to citation with #oabot.
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| pages = 70–72
| title = Geometry of the isosceles trapezium and the contra-parallelogram, with applications to the geometry of the ellipse
| volume = 20}}</ref>| doi-access = free
}}</ref>
 
==See also==