Respuesta :

Answer:

20√ 2

Step-by-step explanation:

you can solve it by using the Pythagorean theorem which is a^2 + b^2 = c^2

--> 20^2 + 20^2 = c^2

400+400= c^2

800= c^2

c= 20√ 2

wences73
20 because a square is even on all sides

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