Question

if the perimeter of a square is 20 cm then find the length of its side and area​

Answer 1

Answer:

Perimeter of square = 20 cm

or , 4 l = 20 cm

or , l = 20/4 cm

Length = 5 cm

Area of square = l² = ( 5 )² = 25 cm²

Answer 2

Given :

→ Perimeter of a square = 20 cm

To find :

→ Length of its side

→ Area of square

Solution :

Using formula,

→ Perimeter of square = 4a

where,

• a denotes the side of the square

Substituting the given values :-

→ 20 = 4 × a

→ 20 ÷ 4 = a

→ 5 = a

→ The value of a = 5

Therefore, the length of the side of the square = 5 cm

Using formula,

→ Area of square = side²

Substituting the given values :-

→ Area of square = (5)²

→ Area of square = 5 × 5

→ Area of square = 25

Therefore, the area of square = 25 cm²

Know MorE :

• Diagonal of square = √2a
• Perimeter of reactangle = 2(l + b)
• Diagonal of rectangle = √l² + √b²
• Area of rectangle = l × b

where,

• a is the side of the square
• l denotes the length
• b denotes the breadth