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The cross section, of a 3D object, is the 2D shape made when a 2D plane cuts across the 3D object. Often "cross section" refers to the shape made when the plane is at right angles to an axis of the 3D object but this need not be the case.
It has a 6 sided cross-section and a length
In Geometry, cross-section is the shape made when a solid is cut through by a plane. The cross section of a circular cylinder is a circle. * * * * * There are also cross-sections that are ellipses or rectangles.
The cross sections of a pentagonal pyramid can vary depending on the orientation and position of the cut. If the cut is parallel to the base, the cross section will be a smaller pentagon. If the cut is vertical and intersects the apex, the cross section can be a triangle or a trapezoid, depending on where the cut is made. Other diagonal cuts may produce various shapes, including trapezoids or quadrilaterals, depending on their angle and position relative to the pyramid's structure.
In a cesarean section, an incision made vertically along the uterus; this kind of incision makes a larger opening but also creates more bleeding, a greater chance of infection, and a weaker scar