The area of a palalelogram by definition is given by: A = (b) * (h) Where, b: base h: height We must also take into account the following conversion: 1 yard = 3 feet Substituting the values (in feet) we have: A = (3x) * (3y) A = 9xy feet ^ 2 Answer: the area of a parallelogram is: 9xy sq. ft.