Need help on this please

11.3 (√128)

Step-by-step explanation:

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)

if you explain the the question more correctly i might be able to answer this better

step-by-step explanation: