Question

what is the length of a diagonal of a square of side 10 centimetre​

Answer 1

Answer:

10√2 cm

Step-by-step explanation:

Diagonal with two sides of square forms a right angled triangle

Let diagonal be x

By hypotenuse side theorem

(10)^2+(10)^2=(x)^2

x^2=100+100=200

x=√200=10√2 cm.