For another look check out the below version built by Alan Brix of New Trier High School in Winnetka, Illinois. This is part of The New Trier Connections Project, which is a collection of hands-on exhibits gathered and created by faculty and students at New Trier High School in Winnetka, Illinois, to illustrate connections among art, math and science.
They gave the following description:
The "impossible triangle" is a triangle with THREE RIGHT ANGLES! It was invented in 1958 by mathematicians R.L. and S. Penrose. It appears to be an Escher-like triangle that can be drawn but not constructed . . . But as you can see below, we constructed it!
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