Question

find the diagonal and perimeter of a square whose area is 400 per metre square​

Answer 1

20√2 m and 80 m

Step-by-step explanation:

side of square = √400= 20 m

Perimeter of square = 4×side=4×20=80 m

(Diagonal)^2=2×{side}^2=√800=20√2 m

Answer 2

Answer:

Step-by-step explanation:

Side of the square= square root of 400=20m^2

Now, perimeter of a square= 4*side of the square=4*20= 80 m

Also, area of a square=(diagonal)^2/2

So, 400= d^2/2

d^2=800

Therefore, d=square root of 800 = 20root2