Squaring Numbers and Perimeter Calculation

Squaring a Number

• Squaring a number involves multiplying it by itself.
• This is represented by raising the number to the power of two.
• The result is known as the square of the number.
• For example, the square of 5 is 5 x 5 = 25, written as 5² = 25.

Representing Square Numbers

• A square number can be visually represented by drawing a square whose area is equal to the square number.
• For example, 25 can be represented by a square with a side length of 5 units.

Calculating Perimeter

• To calculate the perimeter of a square, first determine the side length.
• The side length is the square root of the area.
• Add all the sides together to find the perimeter.
• For instance, a square with an area of 9 cm² has a side length of 3 cm (3 x 3=9).
• The perimeter of this square is 12 cm (3 cm + 3 cm + 3 cm + 3 cm).

Perfect Squares

• A perfect square is a number that can be represented by a square using a whole number of units.
• For example, 16 is a perfect square as it can be represented by a square with a side length of 4 units.
• A number is not a perfect square if it cannot be represented by a square using a whole number of units.
• For example, 20 is not a perfect square, as it can only be represented by a 4 x 5 rectangle.