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<p>(1961) by artist <a href="page.php?w=M._C._Escher">M. C. Escher</a>, whose earlier depictions of impossible objects partly inspired it.</p>

<p><big>Description</big></p>
<p>The tribar/triangle appears to be a <a href="page.php?w=solid">solid</a> object, made of three straight beams of square cross-section that meet pairwise at right angles at the vertices of the <a href="page.php?w=triangle">triangle</a> they form. The beams may be broken, forming cubes or cuboids.</p>

<p>This combination of properties cannot be realized by any three-dimensional object</p><p>
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