nd the area of trapezium whose parallel sides are 20 cm and 18 cm long, and the distance between them is 15 cm? Choose the correct choice from the following choices
A) 766 cm 2
B) 535 cm 2
C) 285 cm 2
D) 324 cm 2
E) 235 cm 2

Rationale: area of a trapezium = 1 / 2 ( sum of parallel sides ) * ( perpendicular distance between them ) = 1 / 2 ( 20 + 18 ) * ( 15 ) = 285 cm 2 answer : c
Answer: C