Question 1015730
Use the law of cosines,
{{{g^2=h^2+i^2-2hicos(G)}}}
{{{g^2=8^2+12^2-2(8)(12)cos(96)}}}
{{{g^2=64+144-192(-.1045)}}}
{{{g^2=228.07}}}
{{{g=15.1}}}
So then using the law of cosines again,
{{{i^2=g^2+h^2-2ghcos(I)}}}
{{{cos(I)=(i^2-g^2-h^2)/(-2gh)}}}
{{{cos(I)=(144-228.07-64)/(-2(15.1)(8))}}}
{{{cos(I)=0.6129}}}
{{{I=52.2}}}