Question

Triunghiul ABC AB 12 cm m (B)= 30° BC=10 ARIA triunghiului ABC=?

Answer 1

$arie = \frac{l \times l \times \sin(30) }{2}$
$arie = \frac{10 \times 12 \times \frac{1}{2} }{2}$
$arie = 30 {cm}^{2}$

Answer 2

A=AB x BC x (sin 30) : 2  = 12x10x1:4 = 30cm^2