What is the shape of the cross section taken parallel to the base of a square pyramid?

Solution:

If a cross section of the square pyramid is taken at any height from the base, it will always be a square.

The higher the height at which the cross section is taken, the smaller the size of the square.

The diagram below depicts the problem statement:

The lower square is bigger than the upper square.

What is the shape of the cross section taken parallel to the base of a square pyramid?

Summary:

The shape of the cross section of a square base pyramid will be a square.