Any sedimentary rock that forms, as sediments settle out of a solution, is called a chemical sedimentary rock. Sediments can settle out of a solution either by the liquid in the solution evaporating, or by too much of the sediment dissolving in the solution (called supersaturation).
A lozenge (â), often referred to as a diamond, is a form of rhombus. The definition of lozenge is not strictly fixed, and it is sometimes used simply as a synonym (from the French losange) for rhombus. Most often, though, lozenge refers to a thin rhombusâa rhombus with acute angles of less than 45Â°.
A trapezoid is defined as a four-sided polygon with one pair of parallel sides. A rectangle is a four-sided polygon with each side parallel to its opposite side (basically, two pairs of parallel sides) and four right angles, so all rectangles could technically be considered as trapezoids. Hope this helps.