Construction of Squares from a Parallelogram
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This Demonstration shows that the centers of four squares erected either internally or externally on the sides of a parallelogram are the vertices of a square.
Contributed by: Izidor Hafner (January 2016)
Open content licensed under CC BY-NC-SA
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"Construction of Squares from a Parallelogram"
http://demonstrations.wolfram.com/ConstructionOfSquaresFromAParallelogram/
Wolfram Demonstrations Project
Published: January 12 2016