Question

each diagonal of a square 12 cm of long it's area​

Answer 1

Step-by-step explanation:

side of square be x

(12)²=(x)²+(x)²

144= 2x²

x²=144÷2

x²= 72

x=✓72

x=8.4

perimeter of square=4×s

= 4x8.4

= 33.6cm²

Answer 2

ANSWER

$Area of square = \frac{1}{2}(diagonals)^{2}$

                       = $\frac{1}{2} (12)^{2}$

$\frac{1}{2}(144)=72cm^{2}$

HOPE IT HELPED !!!!!!