Which of the following is an arithmetic sequence 1.4,8,12,16,20
2.1,3,7,15,31
3.2,9,16,23,30
4.1,1,2,3,5,8
5.1,2,4,8,16
6.13,9,5,1,-3
7.11,17,23,30,36
8.29,20,11,2
9.3,9,27,81
10.0,1,3,6
11.11,15,19,23

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