The shape which is obtained on cross section is:
Square.
We know that when we slice a three dimensional figure with the help of a plane such that the plane is parallel to the base of the figure then the shape of cross section so obtained is similar to the base of the figure.
" We know that a square pyramid is a three dimensional figure such that the base of the figure is in the shape of a square and the other faces are triangle "
Hence, the shape of cross-section taken parallel to the base of a square pyramid is:
Square
