Find the area of the quadrilateral of one of its diagonals is 20 cm and its off sets 9 cm and 6 cm? Pick:
A) 188 cm 2  B) 150 cm 2  C) 168 cm 2  D) 198 cm 2  E) 987 cm 2

Rationale: "1 / 2 * 20 ( 9 + 6 ) = 150 cm 2 answer : b"
Answer: B