The Bricard octahedron is a type of self-intersecting polyhedron that is notable in the study of geometric structures and properties. Named after the French mathematician Georges Bricard, it is an example of a polyhedron with an unusual and complex structure. The Bricard octahedron has eight faces, all of which are congruent triangles. Unlike more regular polyhedra, it features intersections where the edges cross over one another.
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