Formula Used: Area of square = a2 Diagonal of square =a√2 ; where a = sides of square Calculation: Let the sides of the square be 'a' unit ⇒ Area of square with side 'a' unit =a2 ⇒ Area of square with side ′a√2′ unit = 2a2 ∴ Required ratio of area =a2/2a2=1/2