Perimeter and area of squares and rectangles

Learn all the formulas to calculate the perimeter and the area of rectangles and squares.

 

Notes

How to calculate the perimeter and the area of rectangles and squares?

Learn all the formulas to calculate the perimeter and the area of rectangles and squares.

Discover how to solve geometry problems with rectangles and squares.

 

Table of contents of this lesson: Perimeter and area of squares and rectangles

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Area of a square

You already know that the square is a special rectangle.

What is the area of a square whose sides measure 3 cm?

Divide the square into small equal squares of 1 cm: it takes 9 units to fill the square.

The area of the square is given by the multiplication of one side by itself:

A = l x l = l£$^2$£

Area of a rectangle

Area of a rectangle

Perimeter of squares and rectangles

Perimeter of squares and rectangles