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.)
Rectangles have longer sides than any type of square. Opposite sides of rectangles are of equal lengths. All sides of squares are of equal lengths. Rectangles have longer sides than any type of square. Opposite sides of rectangles are of equal lengths. All sides of squares are of equal lengths.
1 A square is a special case of a rectangle where all four sides are the same length. Adjust the rectangle above to create a square.  It is also a special case of a parallelogram but with extra limitation that the angles are fixed at 90Â°. See Parallelogram definition and adjust the parallelogram to create a rectangle.