No. Isosceles trapezoids don't have 2 sets of equal sides, which is what a parallelogram is.
trapezoids are never parallelograms.
they are not congruent
No because trapezoids have different properties to that of parallelograms but they are both 4 sided quadrilaterals.
There are absolutely no trapezoids that are also parallelograms.
No. (To the extent that I can make any sense out of the question.)
No but they are both 4 sided quadrilaterals.
Some people define trapezoids as having at least one pair of parallel sides. By this definition, all parallelograms are trapezoids, though not all trapezoids are parallelograms.Some people define trapezoids as having exactly one pair of parallel sides. By this definition, the terms "trapezoid" and "parallelogram" are mutually exclusive.
Quadrangles that are not parallelograms = trapezoids, kites, any other polygon that is not a parallelogram