Work out triangle altitude instantly with clear inputs, formula shown and shareable results.
Every altitude satisfies Area = ½ × side × altitude, so once Heron's formula gives the area each altitude follows as hₐ = 2·Area / a.
Altitude from area
hₐ = 2·Area / a, with Area = √[s(s−a)(s−b)(s−c)]
Yes. In an obtuse triangle two of the altitudes meet the extensions of the sides rather than the sides themselves.
The altitude to the longest side, since the product side × altitude is constant.