Definition of rectangle length and width:

The first type: the long side of a rectangle is called length, and the short side is called width.

The second type: the same direction as the horizontal plane is called length, and vice versa 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-Rectangular Properties:

(1) The two diagonals are equal;

(2) Two diagonal lines are equally divided;

(3) Two groups of opposite sides are parallel respectively;

(4) Two groups of opposite sides are equal respectively;

(5) All four corners are right angles;

(6) There are two symmetrical axes (there are four squares);

(7) Unstable (easily deformed);