The vertical cross sections are trapezia or triangles. The horizontal cross sections are rectangles which are mathematically similar to the base.

We need some pictues of the cross sections of manufactured boards. Thank you.

When a sphere is cut into cross sections, the shape formed is a circle. This is because all cross sections of a sphere will be circular in shape, regardless of the angle or position of the cut.

Ram K. Tripathi has written:

'Universal parameterization of absorption cross sections' -- subject(s): Mathematical models, Ions, Cross sections (Nuclear physics), Absorption cross sections, Heavy ion collisions, Absorption, Neutron cross sections

'Can Bose condensation of alpha particles be observed in heavy ion collisions' -- subject(s): Collisions (Nuclear physics), Bose-Einstein condensation, Heavy ions, Alpha rays

'New parameterization of neutron absorption cross sections' -- subject(s): Absorption cross sections, Neutron cross sections, Parameterization

Some cross sections are rectangle and octagon.