Move the points in the grafic or define the point coordinates in the numeric field.

### Properties of the rectangle

The opposite sides are equal. The opposite sides are parallel. The diagonals halve each other. All angles have 90°.

### Crcumference of the rectangle

With the side length a = AB = CD and b = BC = DA is the circumference:

$U=2a+2b$

### Area of the rectangle

With the side length a and b is the area:

$F=a*b$

### Diagonal length of the rectangle diagonals

With the side length a and b is the diagonal length given by:

$d=\sqrt{{a}^{2}+{b}^{2}}$