Radius of a circle is 2 feet. Is the area rational or irrational?

Formula for the area of a circle:  A  =  π·r²

--->   A  =  π·2²

--->   A  =  4π

This answer is irrational because π is irrational and any rational number (like the number 4) times an irrational number has an irrational answer. (Irrationality wins!)