Respuesta :

Answer:

Missing side is 9 cm

Step-by-step explanation:

a^2 + b^2 = c^3

(12)^2 + b^2 = (15)^2

144 + b^2 = 225

b^2 = 81

[tex]\sqrt{b^2}[/tex] = [tex]\sqrt{81}[/tex]

b = 9 cm