Instruction

1

Write the known parameters of the rectangular figure. In addition to

**the perimeter**and to find the area needs to be known is another value either side of the rectangle.2

According to the formula,

**the perimeter**of the rectangle is, as the sum of all its sides. Because in a rectangle opposite sides are equal, we can write the formula for**the perimeter**: P = (d+c)*2, where d and c are the adjacent sides of shapes.3

**The area of**rectangular shapes is determined by the product of its two adjacent sides: S = d*c. Thus, knowing one side, you can easily find the area of the shape.

4

Substitute in the formula for

**the perimeter**and the known values: one of the sides and**the perimeter**. Express from the resulting equations the second unknown side and calculate it. Substitute the value obtained into the formula area. Calculate the value of the S - square shape.