A nonequilateral triangle encapsidated by a square illustrating a symmetry-mismatch structure. (a) When the squares are lined up, the triangles become random. (b) If the object is projected from an orientation Ω₁, the projection orientation of the square has three other equivalent orientations (Ω₂, Ω₃, and, Ω₄). In contrast, only the projection orientation Ω₁ is correct for the triangle that has no symmetry.