It is one of the parallel sides - usually the longer of the two.
no, it's 2d
first of all its not trapiezeim it is trapezium, a trapezium whether 2d or 3d as it is a term it is called trapezium only.
No because it's 2D
Two-dimensional
A trapezoid or trapezium IS a 2D shape and so there is no "turning" required.
Triangle & trapezium
The 2D shape which has one line of symmetry is the trapezium.
Same as on a cube: six.
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 is a 2D shape; volume it an attribute of 3D shapes. The volume of all trapezia is 0.
It is a cube which is 3D whereas the rest are 2D.
Lots of possibilities: an isosceles triangle, an isosceles trapezium, an irregular polygon with an odd number of sides, where the sides and angles on either side of the base are symmetric.