Get the Radius which is 8 then multiply (8)(8) and then get 64, finally you need to do 64*3.14 to get the final answer of 200.96. Then you need to divide that by two which would give you the final answer of 100.48
Step-by-step explanation: When the coordinates are reflected in both axes, it is technically just going diagonally. And 'base' means perimeter. so that is your answer. :)