Question

Calculati aria
a) AB = 1
triunghiului ABC, daca
= 12cm BC=10cm, m (6B) = 60°
6) AC = 10 cm. BD = 6 cm unde A-
= pr AC B
) AB = 6 cm, AC = 9 cm, BC = 12 cm.​

Answer 1

a) AB=12cm,  BC=10cm,  ∡B=60°

$\it \mathcal{A} = \dfrac{AB\cdot BC\cdot sinB}{2}=\dfrac{12\cdot10\cdot sin 60^o}{2}=6\cdot10\cdot\dfrac{\sqrt3}{2}=3\cdot10\sqrt3=30\sqrt3\ cm^2$