Yes a prism can have a square cross-section
Yes, a square can be a cross-section of a pyramid, depending on how the cross-section is taken. If the cut is made parallel to the base of the pyramid and at a height where the sides are still straight and converge, the resulting section can be a square. However, this is only possible if the pyramid's base is also a square and the cut is made at the right height.
A cylinder has a circular cross section, a square prism has a square cross section.
Columns that square in cross section
The following are some shapes having a square cross section: a cube, a cuboid, a square pyramid.
square
a square
Depending on the inclination of the plane used for the cross-section, it could be a square, rectangle, trapezium, triangle.
It can be a square, a trapezium, a quadrilateral or a triangle - depending on the inclination of the plane which defines the cross section.
The formula for cross section area of a square is very easy to use. Measure the length of one side of the square it. If you are doing the cross section area of a rectangle, measure both sides and multiply them together.
A square.
A square
If you turn a square 45 degrees the Corners get cut off making 4 extra sides. 4sides + 4sides makes 8 sides. this makes an octagon