A plane intersects the pyramid parallel to its base. The cross section is a square.
A plane intersects the pyramid perpendicular to its base. The cross section is a triangle.
Rectangular pyramid :
A rectangular pyramid can have several different types of cross sections. The cross section of a pyramid that is perpendicular to the base will be a triangle.
The cross section of a pyramid that is parallel to the base will be a square.
So that, when A plane intersects the pyramid parallel to its base. The
cross section is a square.
When A plane intersects the pyramid perpendicular to its base and through the top vertex. The cross section is a triangle.
Learn more about the rectangular pyramid here:
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