Find the area of the quadrilateral of one of its diagonals is 28 cm and its off sets 9 cm and 6 cm?	Pick one:
A) 210 cm 2
B) 150 cm 2
C) 168 cm 2
D) 198 cm 2
E) 987 cm 2

Rationale: "1 / 2 * 28 ( 9 + 6 ) = 210 cm 2 answer : a"
Answer: A