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Penrose triangle and polygons gradated black. Penrose tribar, an impossible object, appears to be a solid object, made of three straight bars. Further square, pentagon, hexagon, heptagon and octagon. premium vector by Furian
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triangle white object solid illustration black line square symbol visual optical science geometry straight illusion pentagon geometrical hexagon bars octagon impossible polygon heptagon penrose tribar optical illusion septagon penrose triangle penrose tribar
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