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.
1 A trapezoid is a quadrilateral with one pair of opposite sides parallel. 2  It can have right angles (a right trapezoid), and it can have congruent sides (isosceles), but those are not required.