Question

Determinati aria ΔABC, stiind ca AB=12, AC=3 si m(Â)=30°

Answer 1

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Answer 2

Calcularea ariei unui triunghi folosind sinusul:
$\it \mathbf{A_{ABC} = \frac{b \cdot c \cdot sin \: A}{2} = \frac{AB \cdot AC \cdot sin \: A}{2} = \frac{12 \cdot 3 \cdot sin \: 30^{o} }{2} = 18 \cdot \frac{1}{2} = 9 \: cm^{2} }$