Răspunsuri

2014-05-12T11:32:27+03:00
M(C)=180-120=60
suma masurilor unghiurilor in tringhi=180⇒m(A)+m(B)+m(C)=180
⇒m(B)=30
cosC=ac/bc⇒BC=AC/cos C=8/1/2=16
in triunghiu ADC cos C= DC/AC⇒DC=AC cos C=4
BC=BD+DC⇒BD=BC-DC=12