What shape is the base of a square pyramid

- What shape is found on the base of a square pyramid
- What shape is a cross sections perpendicular to the base of a square pyramid
- What shape is a cross sections parallel to the base of a square pyramid
- What type of 2d shape is the base of the square pyramid
- What type of 2d shape is the base of the object square pyramid
- What is the shape of the cross section taken parallel to the base of a square pyramid
- How many pyramids are there in the world