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(a) Opposite sides are parallel.
(b) Two pairs of adjacent angles add up to 180 degrees.
(c) The two non-parallel sides are unequal. (d) The diagonals intersect.
(e) The line joining the mid points of the nonparallel sides is parallel to the parallel sides and is equal to half the sum of the parallel sides.
(f) A trapezium can be inscribed in a circle
(g) The sum of the four exterior angles is 4 right angles.
(h) The sum of the four interior angles is 4 right angles.
