Heron's Formula Calculator

Your details

Length of the first side of the triangle.
m
Length of the second side of the triangle.
m
Length of the third side of the triangle.
m
AreaAcute triangle
14.6969m²

Area of the triangle computed via Heron's formula

Semiperimeter (s)9m
Perimeter18m
Altitude to side a (hₐ)5.8788m
Altitude to side b (hᵇ)4.899m
Altitude to side c (hᶜ)4.1991m
Angle A44.42°
Angle B57.12°
Angle C78.46°
Inradius (r)1.633m
Circumradius (R)3.5722m
Triangle typeAcute triangle
Altitude hₐ5.8788
Altitude hᵇ4.899
Altitude hᶜ4.1991

Area = 14.6969 m² (Acute triangle).

  • The semiperimeter is 9.0000 m and the area is 14.6969 m².
  • The inscribed circle has radius 1.6330 m and the circumscribed circle has radius 3.5722 m.

Next stepHeron's formula works for any triangle without needing the height. If you know base and height instead, use the standard A = 0.5 × base × height formula.

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