2. The circumference of rectangle =2× length +2× width.

3. The circumference of a rectangle =2× (length+width).

Rectangle, a mathematical term, is a parallelogram with right angles called rectangle. It is also defined as a parallelogram whose four corners are right angles. At the same time, the square is a special rectangle and a diamond.

Definition of rectangle length and width:

The first opinion: the long side of a rectangle is called long and the short side is called wide.

The second opinion: the same direction as the horizontal plane is called length, and the opposite is called width. The length and width of a rectangle are relative, and it cannot be absolutely said that "it is longer than the width", but it is customary to say that the long one is long and the short one is wide.

Extended data:

zone

Let the length of the rectangle be

, width is

, with an area of

, the area of the rectangle is

The popular expression is: rectangular area = length × width.

bellyband

Let the length of the rectangle be

, width is

, the circumference is

, the perimeter of the rectangle is

The popular expression is: the circumference of a rectangle = (length+width) ×2.