<prompt> Pata cos C katika pembetatu ya kulia iliyoonyeshwa hapa chini.asyjozi A,B,C;A 0,0;B 6,0;C 0,8;choraA--B--C--A;choraalama ya kuliaB,A,C,10;leboA,A,SW;leboB,B,SE;leboC,C,N;lebo10,BC2,NE;lebo6,B2,S;asy  <response>: Nadharia ya Pythagorean inatupa AC sqrtBC2 - AB2 sqrt100 - 36 sqrt648, hivyo cos C fracACBC frac810 frac45. 