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CBSE Class 4 Maths - Perimeter

CBSE Class 4 Maths - Perimeter

The word Perimeter comes from two Greek words “PERI” which means around and “METER” which means measure. A Perimeter is used either to indicate the path or its length—in one dimension.
The perimeter of Square:
To find the perimeter of a square you have to add the lengths of all the four sides.
perimeter of a square
The perimeter of any closed geometrical object is defined as the distance around that object i.e. the length of its boundary. So, it can be said that a square’s perimeter is its total boundary. For a square, the perimeter is calculated by adding its four sides.
We know that all the sides of a square are equal and hence, its perimeter will be 4 times its side, i.e. 4 × sides.
The formula for Perimeter of a Square Perimeter of Square (P) = 4 × side

Derivation of a Square’s Perimeter
The perimeter of the square is defined as the length of the boundary of a square.
The Perimeter of the square formula is given by,
Perimeter = sum of the lengths of 4 sides
= side + side +side + side
= 4 × side
Therefore, the perimeter of Square = 4s units


Click Practice Worksheet Mental Maths for CBSE Class 4

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