9, okay so here whenever u see lighthouse, u do SAS rule, i took this a few months ago and this shortcut helps so the SAS rule is b^2+c^2-(2xbxc)cos(the degree or angle u have) all of that under the radical so we're gonna do (9)^2+(4)^2-(2x9x4)cos65 and put this all under the radical u get 8.75 round that u get 9 also if u get another qs like this where they give u two degrees, just subtract them so u can put it with the cos.
