Respuesta :

starlipika

Answer:

[tex] \sqrt{200} [/tex]

Step-by-step explanation:

you have to use pythagoras' theorem

a^2 + b^2 = c^2

diagonal is c as it's the hypoteneuse

10^2 + 10^2 = c^2

100 + 100 = c^2

c =

[tex] \sqrt{200} [/tex]