Question

The diagonal of a square is 12 rutober 2 cm.find it's perimeter

Answer 1

diagonal of a square=a√2
diagonal of this square=12√2
by the problem,
12√2=a√2
a=12cm
perimeter=12×4=48cm

Answer 2

Answer:

$\bf \sqrt{ {a}^{2} + {a}^{2} } = 12 \sqrt{2} \\ \bf \sqrt{2 {a}^{2} } = 12 \sqrt{2} \\ \bf a \times \cancel { \sqrt{2}} = 12 \cancel { \sqrt{2}} \\ \purple {\fbox {a = 12}}$

Now Perimeter ,

Perimeter of a square = 4×a =4×12 =48 cm

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