Question

sa se calculeze aria triunghiului ABC stiind ca AB=BC=4 si m(ABC)=60 grade

Answer 1

$A_{\Delta}=\frac{AB*BC* sin \ \angle ABC}{2} \\\\ \\ A_{\Delta}=\frac{\not 4*4* sin \ 60^0}{\not 2} \\\\ A_{\Delta}=\not2*4* \frac{\sqrt{3}}{\not2} \\\\\\ \boxed{A_{\Delta}=4\sqrt{3}}$