trapezium
Truncated pyramid.
Trapezoid is 3D. The shadow of this shape is called Trapezium.
An 3d trapezoid
3D trapezoid
Oh, dude, you mean a 3D trapezium? That's like calling a square a 3D square, it's just a trapezoid. Adding that extra dimension doesn't change its name. It's still just a trapezoid, but with a little more pizzazz.
2d
Our maths teacher told us that it was a trapezoid. That's how you spell it. ENJOY!
It is a trapezoid which is a 2D shape whereas the rest are 3D shapes.
A trapezoid prism
Cubes, cuboids, Trapezoid prisms, octahedrons
You don't... you cant have 3 faces
If you take a regular four sided pyramid and chop off the top, parallel with the base, the left over piece would be a solid with four identical trapezoidal faces and a square top and bottom. The only name I know is 3-D trapezoid.