The figure below shows a cyclic quadrilateral ABCD. ABEF, BCGH, CDJK, and ADLM are rectangles of centers O1, O2, O3, and O4, respectively, so that AF = CD, BH = AD, CK = AB, and DL = BC. Prove that O1O2O3O4 is a rectangle.
Geometric art is a form of art based on the use and application of geometric figures. A geometric figure is any set or combination of points, lines, surfaces and solids.
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