What is the perimeter of this tile?

How do you solve a question like this?

Which of these would have been most likely to have been a carpetbagger during the reconstruction era? a) a new york businessman who relocated to mississippi b) a former slave who was able to buy land in birmingham c) a carolina-born politician who supported the democratic d) a former confederate officer who owned a farm in memphis eliminate

Is (root2 -2)^2 rational or irrational. show the steps and answer fast