Question

ab=3,ad=√3si masura BAD=120°.calc aria)

Answer 1

$A= \frac{AB*AD*sin(BAD)}{2}= \frac{3* \sqrt{3} *sin(120)}{2}=\frac{3 \sqrt{3} * \frac{ \sqrt{3} }{2} }{2}= \frac{9}{4}$