Question

please solve question​

Answer 1

Step-by-step explanation:

1)

diagonal is 10 √2 centimetre,

all sides of a square are equal

let all sides be x,

also the angles of a square are 90°each

so each angle forms a right angle with the diagonal

therefore by Pythagoras theorem

(hypotenuse)²=(base)²+(height)²

(10✓2)²=x²+x²

100×2= 2x²

200 / 2 =x²

100=x²

x=10. taking square roots on both the sides

hence, the perimeter =x+x+x+x

=4x

=4*10

=40

hence the perimeter is 40cm

the answer is option d) 40cm