Question

what is formula of area of triangle

Answer 1

$\frac{1}{2} \times base \times height$
or
$\sqrt{s(s - a)( s-b )( s-c )}$
where
$s = \frac{a + b + c}{2}$
where
a,b,c are the three sides of the triangle

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Answer 2

Area of triangle = 1/2 x b x h .