Altitude of a triangle
This online calculator computes the altitude length 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).
The altitude of a triangle to side c can be found as:
where S - an area of a triangle, which can be found from three known sides using, for example, Hero's formula, see Heron's formula calculator
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PLANETCALC, Altitude of a triangle