The geometric shape used in truss bridges is the triangle.
If I understand your question, the shape would be "geometrical"
spiders do not build geometrical shape webs
Geometrical symmetry is a mathematical term for a shape that, if torn in half, can be mirrored and restored to the shape again.
We cannot assess the efficiency of a geometrical shape unless we have a particular purpose in mind. You will have to state what you wish to efficiently do, by means of a geometrical figure.
If you mean a round can, the shape is cylindrical.
Yes
Yes
A sphere.
it is a geometrical shape
A pyramid.
Tetraedral