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.
A square is a regular quadrilateral. All of its angles are equal (90Â°). All of its sides are of equal length. Opposite sides are parallel. The diagonals bisect each other at 90Â°. The diagonals are equal in length.ectangle. All angles are equal (90Â°). Opposite sides are of equal length. Opposite sides are parallel. The diagonals bisect each other. The diagonals are equal in length. It has 2 lines of symmetry. Order of rotational symmetry: 2.