A cube has six faces, each bearing a different symbol: a single dot, two dots, a cross, a horizontal line, a triangle, and a circle. Three positions of the same cube are observed as follows:

Position 1: top face shows a single dot, front face shows two dots, right face shows a cross.

Position 2: top face shows a single dot, front face shows a circle, right face shows a horizontal line.

Position 3: top face shows a single dot, front face shows a cross, right face shows a circle.

Based on these three positions, which symbol is on the face opposite the face bearing a single dot?