a 3-D impossible shape consisting of three bars, each at right angle to the adjacent bar, which seem to make a twisted triangle. The shape is more correctly referred to as a tribar, since authentic triangles have three angles which add up to 180

PENROSE TRIANGLE: "The concept of the penrose triangle seemed to please my geometry teacher far more than it did any of the students."
Cite this page: N., Pam M.S., "PENROSE TRIANGLE," in, April 7, 2013, (accessed February 23, 2020).