no, it's 2d
Same as on a cube: six.
it a triangle as a 2d shape
A trapezoid or trapezium IS a 2D shape and so there is no "turning" required.
No because it's 2D
Two-dimensional
The 2D shape which has one line of symmetry is the trapezium.
Triangle & trapezium
No, it is a 3D shape.
because triangle is only 2d shape but a prism is 3d shape
The latter
No. A rectangle is a 2D shape, while a prism is a 3D figure.