nd the area of trapezium whose parallel sides are 20 cm and 16 cm long, and the distance between them is 15 cm?  Pick one:
A) 270 cm 2
B) 275 cm 2
C) 280 cm 2
D) 285 cm 2
E) 290 cm 2

Rationale: "area of a trapezium = 1 / 2 ( sum of parallel sides ) * ( perpendicular distance between them ) = 1 / 2 ( 20 + 16 ) * ( 15 ) = 270 cm 2 answer : a"
Answer: A