shapes have also be generated from a series of lines rotated in plan.
the lines has been connected to create a skeletal frame
planes are then formed to create a unique shape derived from the square
this is an extrusion of a circle
the top of the shape has been altered using the scale tool, this has changed the overall shape into something more like a trapezium
this has then been extruded again
not the shape has been rotated in the Z origin.
this shape has been generated from the rotation of a hexagon, it became to complicated to manage