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.


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


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




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