A cylinder has a circular cross section that is parallel to its base.
The cross section of a sphere is most often a circle. When the cross section is taken parallel to the base of a cylinder, it is also a circle.
The shape of the cross section taken perpendicular to the base of a cylinder is a circle. This circular cross section is consistent regardless of the height at which the cut is made, as long as the cut is perpendicular to the axis of the cylinder. The radius of the circle corresponds to the radius of the cylinder's base.
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.
The cross-sectional shapes taken parallel to the base of a pyramid are similar to one another. This similarity arises because these sections maintain the same proportions and angles as the base, regardless of their position along the height of the pyramid. As a result, each cross section is a scaled-down version of the base shape.
A cone or a pyramid.
The cross section of a sphere is most often a circle. When the cross section is taken parallel to the base of a cylinder, it is also a circle.
Only if the section is taken by a plane parallel to one of the faces.
The shape of the cross section taken perpendicular to the base of a cylinder is a circle. This circular cross section is consistent regardless of the height at which the cut is made, as long as the cut is perpendicular to the axis of the cylinder. The radius of the circle corresponds to the radius of the cylinder's base.
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 solid with a triangular cross section when the cross section is taken parallel to the base could be either a triangular prism, a triangular pyramid, or a triangular frustrum.. I've been sitting here trying to convince myself (without actually bearing down and trying to prove it mathematically) that any cross section of a regular tetrahedron (a special case of triangular pyramid) taken perpendicularly to the base is a triangle, and I THINK this is the case, but as I said I certainly haven't rigorously proven it; I'm just unable to come up with any obvious situation where this is not true.
The cross-sectional shapes taken parallel to the base of a pyramid are similar to one another. This similarity arises because these sections maintain the same proportions and angles as the base, regardless of their position along the height of the pyramid. As a result, each cross section is a scaled-down version of the base shape.
The answer depends on the orientation of the pipe and the cut. Even if the cut is vertical, it can be along the axis (length) of the pipe, at right angles to it or at a slant. If the cut is along the axis, the cross section will be two rectangles where the length of the rectangle is the length of the pipe and the width is the thickness of the pipe. If the pipe has negligible thickness, this may be taken to be two parallel lines. If the cut is at right angles to the axis then the cross section will be an annulus which, when the thickness is negligible will become a circle. Finally, if the cut is skew, then you will get ellipses which will collapse to a single ellipse for negligible thickness.
The vertical cross section of a right vertical cone is a triangle if that cross section is taken from the vertex. Any other vertical cross section will reveal a hyperbola (with endpoints on the base of the cone). A link can be found below.
similar
pyramid
A cone or a pyramid.
A tapered prism.