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# Altitude of a triangle

This online calculator computes the length of an altitude of a triangle, given the lengths of sides of a triangle.

As usual, triangle sides are named a (side BC), b (side AC) and c (side AB).
Altitude of a triangle to side c can be found as:
$h_c=\frac{2S}{c}$
where S - an area of a triangle, which can be found from three known sides using, for example, Hero's formula, see Calculator of area of a triangle using Hero's formula

#### Altitude of a triangle

Digits after the decimal point: 2
Altitude to edge c

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PLANETCALC, Altitude of a triangle