The first section.
A conic section is a curve formed by the intersection of a plane with a cone (conical surface). If the section is parallel to the base of the cone, the conic section has a fixed diameter and is a circle. Any other plane that does not intersect the apex is either a parabola, a hyperbola, or an ellipse.
The cross section of a cuboid box, bt a plane at an angle to all of its sides will be a point, triangle or quadrilateral - depending on it location. The cross section by a plane perpendicular to an axis of the box will be a rectangle.
quadrant in mathematical terms is a section on a Cartesian plane there are 4 quadrants on a Cartesian plane
Cross Section
Section of the plane.
The plane that separates the mouth into a maxillary and mandibular section is called the occlusal plane.
The section that divides the body on the longitudinal plane into equal right and left parts is called the midsagittal plane. This plane passes through the midline of the body, creating symmetrical halves.
a
This could be a beading plane, a plane of cleavage or schistosity, or a fault plane.
A cut along the transverse plane= transverse or cross section. *(If cut at an angle= oblique section).
The first section.
If we consider the longitudinal cross section of the single stage of CFC disc, then the plane containing the impeller blade section with hub & shroud is known as the Meridional Plane.
At the rear of a ship or plane
It is a cross section.
Fuselage
It is the cross-section of the figure by the plane.