Answer :
Given,
Perimeter of a square=20 cm
Perimeter of a square=4 x side of a square(s)
4 x s =20 cm
s=20/4
s=5 cm
Area of a square = s²
s=5 cm
s²=5²
s²=25 cm²
Hence Area of a square is 25 cm²
Perimeter of a square=20 cm
Perimeter of a square=4 x side of a square(s)
4 x s =20 cm
s=20/4
s=5 cm
Area of a square = s²
s=5 cm
s²=5²
s²=25 cm²
Hence Area of a square is 25 cm²