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Summary
DescriptionLexell's theorem in the plane.png
English: Lexell's theorem in the Euclidean plane (Elements I.37): triangles of constant area on fixed base AB have their free vertex C along a line parallel to the base AB.
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Lexell's theorem in the Euclidean plane (Elements I.37): triangles of constant area on fixed base AB have their free vertex C along a line parallel to the base AB.