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 Trapezoid. A trapezoid is a quadrilateral with only one pair of parallel sides. As shown in the picture below, the parallel sides of trapezoid ABCD are called bases and the sides that are not parallel are called legs. Facts About Trapezoids. The degree measure of the four angles add up to 360 degrees.