An 3d trapezoid
3D trapezoid
2d
Truncated pyramid.
trapezium
A three-dimensional trapezium is called a trapezoid. It is a four-sided figure with at least one pair of parallel sides.
It is a trapezoid which is a 2D shape whereas the rest are 3D shapes.
A trapezoid prism
Cubes, cuboids, Trapezoid prisms, octahedrons
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.
You don't... you cant have 3 faces
If the two sides which are not parallel have equal lengths, then the trapezoid is called an isosceles trapezoid (standard trapezoid has unequal sides). The base angles in an isosceles trapezoid are equal in measurement, also I know that a trapezoid with two nonparallel sides the same length is called an isosceles trapezoid.