Kidney stones, also known as urolithiasis, are a common affliction of the urinary tract.
No. In order for a quadrilateral to be a trapezoid, it must have exactly one pair of parallel sides. A right trapezoid, therefore, has exactly one pair of right angles. However a square would be a right parallelogram (which is the current definition of a rectangle). In the UK, the word trapezoid refers to a quadrilateral with no sides parallel. They use the word trapezium to refer to what Canadians call a trapezoid. To make matters worse, North Americans call a quadrilateral with no parallel sides a trapezium. Here's a summary.
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.