Every trapezium is a convex quadrilateral with a pair of parallel sides that are unequal in length.
A trapezium (US) has no sides parallel, while a trapezoid has one set of unequal parallel sides.
A trapezium has two parallel sides (of unequal length) and two non-parallel sides.
A trapezium is a 4 sided quadrilateral with one pair of parallel sides of unequal length, and it is also known as a trapezoid in the USA.
The trapezoid (UK trapezium) has only 1 pair of unequal parallel sides.
It is not possible to have a quadrilateral with four parallel sides - this would bea series of four parallel lines that do not intersect.A quadrilateral with four sides of equal length is a rhombus, however.And a quadrilateral with 2 pairs of parallel sides is a parallelogram.
A trapezoid is a quadrilateral with two parallel sides of unequal length. It's like a triangle with the top removed and replaced by a line parallel to the bottom line.
I am a rhombus. I don't need to prove that my opposite sides are parallel. If I'm a quadrilateral with four sides that are the same length, then I am definitely a rhombus.
A trapezoid is a quadrilateral shape that has four sides of unequal lengths two of which are parallel to each other. An isosceles trapezoid also has two parallel sides but with two other sides being of equal length.