Hey there! :)
These figures are all alike because all of them are prisms
They are different because the base of each shape is different.
Bases:
The base of the hexagonal prism is a hexagon.
The base of the cube is a square.
The base of the triangular prism is a triangle.
The base of the octagonal prism is an octagon.
The base of the rectangular prism is a rectangle.
Hope this helps :)
