#1) What is the minimum number of sides that the polygon at the base of the prism must have?
Answer: I believe that the two factors that are not included in real GDP per capita, but are included in another standard of living measurement is the Transfer of Assets and Transactions. For example when people grow their own food in their own garden, their consumption is not added to the GDP. Also giving used things to other people like a friend.
I hope it helps, Regards.