Question

Need help on this please

Answer 1

11.3 (√128)

Explanation:

`\\ {a}^(2) + {b}^(2) = {c}^(2)`

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)