👉 A trapezoidal region is a type of region in mathematics that can be described by a closed formula. A trapezoid is a shape with two parallel sides and one base, while the other base is perpendicular to the first base. The area of a trapezoidal region is the product of the lengths of its two bases and their height. For example, consider a trapezoid ABCD with AB as the base, CD as the altitude (height), and BC as