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Near-Penrose Shapes

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The Penrose triangle is an impossible object, but a real object can be made that appears to be a Penrose triangle when viewed from a specific angle. By changing the triangle to an irregular quadrilateral, such a real object can be made using only cubes.

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Click and drag the object to change the viewpoint or use the button to locate the special viewpoint for each shape.

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Contributed by: Jon McLoone (July 2013)
Open content licensed under CC BY-NC-SA

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