Black square

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There are 5 geometric shapes in a square frame: two triangles and three irregular quadrangles. All these figures are stacked quite tightly and occupy almost the entire area of the square. 

Is it possible to put another figure in the same frame – the “black square”, which is located in the round niche of the frame?

How to do that?


This is unique puzzle by russian designer V. Krasnouhov

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