Final answer:
The shapes and dimensions of the tre verso cross section.
Step-by-step explanation:
The tre verso cross section options are:
a) Circular, with a shape of πr^2
b) Rectangular, with a shape of 6
c) Triangular, with a shape of 1/2bh
d) Spherical, with a shape of 4πr^2
These options represent different shapes and dimensions for the cross section. The circular cross section has a shape of πr^2, the rectangular cross section has a shape of 6, the triangular cross section has a shape of 1/2bh, and the spherical cross section has a shape of 4πr^2.