Question

the area of a square whose diagonal is 12 centimetre will be​

Answer 1

The formula of a diagonal of square is √2a

where a = side of square

First we have to find the side of the square which is

12=√2 a

12/√2= a

8.48=a

Area of a square is a²

(8.48)²= 71.91 cm²

So your final answer is 71.91 cm²