c²=a²+b²-2*a*b*cos C> cos C=[a²+b²-c²]/[2*a*b]
in this problem
a=7.6 in
b=8.6 in
c=7.4 in
C=angle V
cos C=[7.6²+8.6²-7.4²]/[2*7.6*8.6]> 0.5887
C=arc cos (0.5887)> C=53.93°> C=53.9°
the answer is
angle V is 53.9°