Which is shape is structurally stronger from external and internal pressures, the triangle or the hexagon?

Question

If building a 3 dimentional structure in space or under water, which shape is better suited to prevent both implosion and explosion when there are continuous or sudden extreme changes in pressure?

Answer 1

i will choose triangle in shape because the triangle binds together not like the hexagon that have many side and their is a tendency that it will breakdown

Answer 2

If the pressure is uniform, the hexagon might be better (a circle even better)

If the external pressure is uneven, a triangle might be more stable, but for a given enclosed area, the bending stresses in the (longer) sides of the triangle will be greater than in the shorter sides of the hexagon.

Answer 3

Triangle, it has more support, but naturally becomes hexagonal.