Which is the height of pyramid y

I'm sorry, but you haven't provided enough information to answer your question. Could you please provide more details or clarify what you are looking for?

To determine the height of a pyramid, we need more information about its shape or dimensions. The height of a pyramid is the perpendicular distance from its base to the apex (top of the pyramid). Please provide additional information such as the dimensions of the base or any other relevant details so that I can help you calculate the height.