Antonia has a green roof and a blue route for green rope is 4 ft in length she cut the green rope into two pieces one of the pieces is 21 in in length how many inches long is the other piece of the green roof use words and numbers to explain your reasoning​

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