You can build a cylinder in two ways: either you draw a circle on a plane, and "raise" it perpendicularly to the plane itself, or you start with a rectangle, and rotate it around one of its sides.
For these reasons, if you cut the cylinder with a plane parallel to the base you have a circular cross section, while if you cut the cylinder with a plane perpendicular to the base you have a rectangular cross section.
When the cylinder is sliced so the cross-section is parallel to the base, the cross-section is a circle. When the cylinder is sliced so the cross-section is perpendicular to the base, the cross-section is a rectangle.
A cross-section is formed when a three-dimensional object is sliced by a plane.
The cylinder has a circular base. When it is sliced in such a way that cross-section is parallel to the base, the cross-section is circular.
When it is sliced in such a way that cross-section is perpendicular to the base, the cross-section is rectangular.
Therefore, we have determined that when the cylinder is sliced so the cross-section is parallel to the base, the cross-section is a circle. When the cylinder is sliced so the cross-section is perpendicular to the base, the cross-section is a rectangle.
Learn more about cross-sections here: https://brainly.com/question/3603397
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