The formula of rectangular area is S=ab, where s is the area of rectangle, a is the length of rectangle and b is the width of rectangle.

1, rectangle, a mathematical term, is a parallelogram with right angles called rectangle. It is also defined as a parallelogram with four right angles, and a square is both a rectangle and a diamond.

2. The long side of a rectangle is called long and the short side is called wide. The same direction as the horizontal plane is called long, and vice versa. 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:

1, and the area is a number indicating the degree of a two-dimensional figure or shape or plane layer in a plane. A surface region is a simulation on a two-dimensional surface of a three-dimensional object. Area can be understood as the amount of material with a given thickness, which is necessary to form a shape model.

2. In the International System of Units (SI), the standard unit area is square meters, and a square area with an area of one meter and an area of three square meters will have the same shape as three such squares. In mathematics, the unit square is defined as 1, and the area of any other shape or surface is a dimensionless real number.

3. Ellipse area formula: S=πab Ellipse area theorem: The area of an ellipse is equal to π times the product of the major semi-axis length (a) and the minor semi-axis length (b) of an ellipse.

4. Parallelogram is a closed figure composed of two groups of parallel lines. Its area formula is S=axh, where S is the area of parallelogram, A is the base of parallelogram and H is the height of parallelogram.

References:

Baidu Encyclopedia _ Rectangular Baidu Encyclopedia _ Area Baidu Encyclopedia _ Area Formula