Parallelogram with Squares Theorem. Level: High School, SAT Prep, College geometry. 

See also:
Triangle with Squares 0 Two
squares
Triangle with Square 1 Two
squares
Triangle with Squares
2 Two squares
Triangle with
Squares 3 Three squares
Triangle with Squares 4: FinslerHadwiger Theorem,
Triangle with Square 5 Two
squares, altitude and median
Triangle
with Squares 6 Four squares
Van Aubel's theorem: Quadrilateral with squares
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Last updated: November 21, 2008 