From their homes, virtual authorâs assistants organize the publishing process for authors anywhere in the world. A typical day might be on the phone, coordinating the activities of the author and several other professionals, doing research on the Internet and answering and sending emails.
(Jump to Area of a Rectangle or Perimeter of a Rectangle) A rectangle is a four-sided flat shape where every angle is a right angle (90Â°). Opposite sides are parallel and of equal length (so it is a Parallelogram).
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.