The egg shape would be stronger because it doesn't have points of weakness, whereas the square-based pyramid does. These points of weakness are the apexes (also referred to as the corners.)
Cicrcle
square based Pyramid * * * * * It does not have to be square based. Any quadrilateral base will do.
A square pyramid is a pyramid whose base is in the shape of a square.
Square Pyramid
a cube and a sphere are different because is more of a square shape and a sphere is cylindrical
Cicrcle
It is an impossible shape.
The shape of a pyramid is the shape of a square based pyramid.
A square pyramid is a pyramid whose base is in the shape of a square.
square based Pyramid * * * * * It does not have to be square based. Any quadrilateral base will do.
a square based pyramid is a square at the bottom and a pyramid at the top
A square!
Since a sphere is round it is a shape without a face.
square based pyramid,
The shape of the bottom of an Egyptian pyramid is a square.