Question

find the area of a square whose perimeter is 84 CM

Answer 1

Perimeter of square = 84
=> 4xside = 84
=> side = 84/4
=> side = 21 cm


Area of square = (side)²
= (21)²
= 441 cm²


Therefore, the area of square is 441 cm².




HOPE IT HELPS YOU !!!!

Answer 2

$perimeter \: of \: square \: = 4 \times side \\ then \: each \: side = perimeter \: \div 4 \\ = 84 \div 4 = 21cm \\ now \: we \: know \: measurement \: of \: each \: side \: is \: 21cm \\ formula \: for \: area \: of \: square = side \times side \\ 21cm \times 21cm \\ 441cm.square$