A square trapezium therefore is a quadrilateral with one right angle (America) or one right angle and a pair of parallel sides (Britain). But it’s still a plane figure. So a literal answer to your question is 1 face, 4 edges, 4 vertices. read more
All four-sided figures have four corners, or vertices. The perimeter of a trapezoid is determined the same way as that of a square or rectangle: the length of all four sides are added together. The area, however, is not determined the same way. For squares and rectangles, the area is determined by the formula area equals length times width. read more