Yes. Is it a sort of trolling? I'm just asking since I wrote once about it: answer to How can a figure be a rectangle, a rhombus and a square? I answer this anonymously since I don't want this to appear on my feed. read more
A parallelogram is a quadrilateral in which both pair of opposite sides are parallel. However a trapezium is one with only one pair of opposite sides that are parallel. Since a parallelogram meets with the condition hence all parallelograms are trapezium. read more
An isosceles trapezoid is a trapezoid where the sides (legs) have the same length, and the base angles have the same measure. It has reflection symmetry. This is possible for acute or right trapezoids. A parallelogram is a trapezoid with two pairs of parallel sides. A parallelogram has central 2-fold rotational symmetry (or point reflection symmetry). read more