How many corners has a 3D hexagon?

A 3D hexagon, also known as a hexagonal prism, has 12 corners. This can be determined by understanding the geometry of a hexagon, which has 6 corners, and a prism, which has 2 additional corners at each end. Therefore, a hexagonal prism has 6 corners from the hexagon base and 2 corners on each of the 6 sides, totaling 12 corners.