Question

in squre length of each side is 20 cm then the length of its diagonal is 20 root 2​

Answer 1

Answer:

diagonal of square = square root of (2*(side)^2 )

so 20root2 is correct

Step-by-step explanation:

when you draw a diagonal, a square is divided into two right angled triangles.

for each triangle, Pythagoras theorem can be used to find the length of diagonal

so

diagonal^2 = side^2 + side^2

diagonal^2 = 2*(side^2)

diagonal = sq root of (2* (side^2))

= 20root2