nd the area of trapezium whose parallel sides are 20 cm and 18 cm long, and the distance between them is 12 cm? Select.
A) 243 cm 2
B) 239 cm 2
C) 267 cm 2
D) 230 cm 2
E) 228 cm 2

Rationale: "area of a trapezium = 1 / 2 ( sum of parallel sides ) * ( perpendicular distance between them ) = 1 / 2 ( 20 + 18 ) * ( 12 ) = 228 cm 2 answer : e"
Answer: E