Particles that form a sedimentary rock by accumulating are called sediment. Before being deposited, sediment was formed by weathering and erosion in a source area, and then transported to the place of deposition by water, wind, ice, mass movement or glaciers which are called agents of denudation.
A cuboid is a box-shaped solid object. It has six flat sides and all angles are right angles. And all of its faces are rectangles.
Definition of a Trapezoid. As a quadrilateral, the trapezoid is a four sided shape. The first unique property about the trapezoid is that it has only one pair of parallel sides (AB and CD as shown below). The trapezoid is also sometimes referred to as the trapezium, but they are the same shapes.