Question 387028
If you have the base and the height, use,
{{{A=(1/2)bh}}}
If you have the sides of the triangle,{{{a}}},{{{b}}},{{{c}}}, then use Heron's formula,
{{{A=sqrt(s(s-a)(s-b)(s-c))}}}
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where {{{s=(a+b+c)/2}}}