Respuesta :

5^2+x^2=13^2 25+x^2=169 169-25=144 x=12 twelve is your answer btw

Answer:

the missing side length = 12m

Step-by-step explanation:

use the pythagorean theorem--a^2 + b^2 = c^2

a^2 + b^2 = c^2

a^2 + 5^2 = 13^2

a^2 + 25 = 169

       - 25    -25

a^2 = 144 -- square each side

a = 12

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