Find the missing length. Round to the nearest tenth, if necessary.
A. 12
B. 17.7
C. 19
D. 22.45

Answer: B 17.7
Step-by-step explanation:
A^2+B^2=C^2 So
B^2= C^2-A^2
B^2= 19^2-7^2
B^2= 319
B=17.7