Question

1.In ∆ABC: AC=10cm, BC=12cm,m(C)=30°.
Aria triunghiului=....cm2

Answer 1

aria = ( AC· BC · sin 30 ) /2 = ( 10· 12 · 1/2 ) /2 = (10· 6 )/ 2 = 30 cm²

Answer 2

AΔABC = AC x BC x sin (ACB) supra 2
AΔABC = 10 x 12 x 0.5 supra 2
AΔABC = 120 x 0.5 supra 2
AΔABC = 60 supra 2
AΔABC = 30