Question

Intr-un paralelogram ABCD, AB 6 cm, BC 10 cm masura unghiului ABC=30 grade. Calculati aria paralelogramulii

Answer 1

$A_{ABCD} = 2 A_{ABC} =$ = 2* $AB*AC * sin(ABC) /2$ =
AB*AC*sin(ABC)=6*10*1/2=30 (cm²)