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.
The diagonals of a rectangle are equal in length to each other and they bisect each other at their point of intersection. When you draw a line that cuts the rectangle into two triangles and then do it again to the other two corners, these two lines will be equal in length to each other.