Answer:
The cross-section that is obtained when slicing of a square pyramid is done perpendicular to base is:
Triangle.
Explanation:
A square pyramid is a pyramid whose base is in the shape of a square.
The square pyramid has 5 faces.
one face is a square and the other four faces are a triangle.
Hence, when the slicing is done perpendicular to the base then the cross-section that is obtained on this slicing will be a similar figure as it's triangular face but may be of different dimensions.
Hence, we will obtain a triangle.