Answer:
11.3 (√128)
Step-by-step explanation:
[tex] \\ {a}^{2} + {b}^{2} = {c}^{2} [/tex]
in this case a is given and c is given
a =side of the triangle
b= side of the triangle
c = hypotenuse or the longest side of the triangle
4^2 + b^2 = 12^2
16+ b^2 = 144
144 - 16 = b^2
128 = b^2
√128 = b
11.3137...= b = 11.3 (rounded to nearest tenth)
