It is one of the parallel sides - usually the longer of the two.
Trapezium
How many parallel sides has a trapezium?
Yes a trapezium is a 2 dimensional shape and belongs to the class of polygons known as quadrilaterals because if has 4 sides
A trapezium has only one pair of parallel sides
It has four sides. ;-)))))))))))))))
Same as on a cube: six.
2d rectangle has 4 sides.
A trapezium has 4 sides
7 sides
3 sides
no, it's 2d