avem cazul in care cunoastem 2 laturi si unghiul dintre ele
se aplica formula a²=b²+c²-2bc cos A
a²=6²+8²-2x8x6x1/2=36+64-48=52
a=2√13
semiperimetrul p= (a+b+c)/2 =(6+8+2√13)/2=7+√13
Aria=S=√[p(p-a)(p-b)(p-c)] =√[(7+√13)(7+√13-2√13)(7+√13-6)(7+√13-8)]=
=√[(7+√13)(7-√13)(√13+1)(√13-1)]=√[(49-13)(13-1)]=√(36·12)=12√3
----------------------------------------succes!------------------------------------------------
