Answer:
Trapezoid is a Quadrilateral which has one pair of opposite sides that are parallel. Length of parallel sides are unequal while length of non parallel sides may or may not be equal.
Other four quadrilaterals are Square, rectangle, Parallelogram , and rhombus.
All these four quadrilaterals have both pair of opposite side parallel and equal.
In this way on the basis of number of parallel sides and equal sides, trapezoid differ from other quadrilaterals.