Question

Aflati aria unui triunghi ABC cu AB=12cm , BC=2cm si masura unghiului B=45 de grade.

Answer 1

$A= \frac{AB*BC*sinB}{2}= \frac{12*2*sin45}{2}= 12* \frac{ \sqrt{2} }{2}=6 \sqrt{2} ( cm^{2} ).$