6 times 3

bonus: 9+10

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

Me d is also an option but i couldn't get it in the picture

Can someone me with this? i’m not sure what to put for my equations.