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.
Best Answer: Depends on how you define trapezoid. Some books define trapezoid as a quadrilateral that has EXACTLY one pair of parallel sides. In this case it would be false, because a rectangle has two pairs of parallel sides. Other books define trapezoid as a quadrilateral that has AT LEAST one pair of parallel sides.