Children with expressive language disorder have difficulty conveying or expressing information in speech, writing, sign language or gesture. (For preschool children, the difficulty expressing themselves in writing is not evident, as they have not started formal education.)
A rectangle is defined as a parallelogram (a quadrilateral with two sets of parallel sides) with the non-parallel sides joining perpendicularly (at 90Â°). A square is a rectangle with the additional constraint the all four sides be of equal length.
1 A rectangle is most often characterized by its height h, and its width, w. 2  The width and height of a rectangle are usually different. 3  If they are the same, then the rectangle becomes a square. 4  The perimeter, or distance around a rectangle is h+w+h+w or 2h+2w.5  The area enclosed by a rectangle is h &times w or hw. The perimeter, or distance around a rectangle is h+w+h+w or 2h+2w. 2  The area enclosed by a rectangle is h &times w or hw. 3  The distance from one corner of a rectangle to the opposite corner is sometimes called the diagonal and is given by (w 2 +h 2) 1/2.