Respuesta :

Answer:

5 inches.

Step-by-step explanation:

This is a right triangle so we can apply the Pythagoras theorem:

13^2 = x^2 + 12^2

--> x^2 = 13^2 - 12^2

--> x^2     =  169 - 144

--> x^2 = 25

--> x = 5.

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