Hi, my daughter ask me this question and i don’t really understand what she’s trying to said, can any one me 48 new stamps 72 used stamps 3/5 represents?

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