Area of A Rectangle

A rectangle is a parallelogram with 4 right angles.  Now, since a rectangle is a parallelogram, its opposite sides must be congruent and it must satisfy all other properties of parallelograms .
1.  4 Right Angles, In a rectangle all angles are 90°

2. The diagonals of a rectangle are congruent (congruent means that objects have 

     the same shape. It does not mean that they are 'equal', exactly).

To find a diagonal using the Pythagorean theorem :
For example, a rectangle has a length of 12 cm and width 5 cm. How long the diagonal ?

The area of a rectangle can be found by multiplying the length times the width. The formula is: A= l * w, where  A is the area,  l is the length,  w is the width, and * means multiply. If a rectangle has a base of  length 10 cm and a width of 5 cm, its area is 10*5= 50 square cm :


Area = lenghth * width
          = 10 * 5
          = 50 cm

If the area of ​​the rectangle is known, to find the length and width can be done as follows:

#Note: one of the elements must be known, for example, the length element .

Area of Rectangle = 120 cm. What is the length ?

Length = Area/Width

              = 120/ 12

              = 10 cm

Do it the same way if the element width is already known