Redneck College Grad
 

A redneck family's only son returns home from college.

The father asks, "Well son, you done gone to college, so you must be perty smart. Why don't you speak some math fer' us?"

The son says, "Pi R squared."

The father yells, "Why son, they ain't teached ya nothin'! Pies are round, cornbread are square."