Aria triunghi oarecare

Formula ariei unui triunghi oarecare:

<img class="mathtex-equation-editor" src="http://chart.apis.google additional reading.com/chart?cht=tx&chf=bg,s,00000000&chco=6f5f5c&chl=A%3D%20%5Cfrac%7Bl_%7B1%7D%5Ccdot%20l_%7B2%7D%5Ccdot%20sin(l_%7B1%7D%2Cl_%7B2%7D)%7D%7B2%7D” alt=”A= \frac{l_{1}\cdot l_{2}\cdot sin(l_{1},l_{2})}{2}” align=”absmiddle” />

A= \frac{AB\cdot AC\cdot sinA}{2}

A= \frac{AB\cdot BC\cdot sinB}{2}

A= \frac{AC\cdot BC\cdot sinC}{2}

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