The width of the rectangle is 9 cm, which is 12 cm less than its length. Calculate the perimeter and area of this rectangle.

First you need to find how many centimeters the length of the rectangle is.

To do this, add another 12 cm to the specified value of the width.


9 + 12 = 21 cm.

In order to find out the perimeter of a rectangle, you need to multiply the sum of the width and length of the shape by 2.

We get:

2 * (9 + 21) = 2 * 30 = 60 cm.

The area of the rectangle will be equal to the product of the shape’s width by its length.

9 * 21 = 189 cm2

Answer: the perimeter of the rectangle is 60 cm, the area of the figure is 189 cm2 (square centimeters).

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.