Triangle Area Calculator - 3 Sides

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

Triangle area by Heron's formula

Perimeter18m
Semiperimeter9m
Altitude on a5.8788m
Altitude on b4.899m
Altitude on c4.1991m
Inradius1.633m
Circumradius3.5722m
Triangle typeAcute Scalene

Area = 14.6969 m² (Acute Scalene triangle)

  • The perimeter is 18.0000 m, and the semiperimeter is 9.0000 m.
  • The inscribed circle has radius 1.6330 m and the circumscribed circle has radius 3.5722 m.
  • The three altitudes (heights) are: 5.8788 m (on side a), 4.8990 m (on side b), and 4.1991 m (on side c).

Next stepIn an acute triangle all angles are below 90 degrees. The circumcenter lies inside the triangle.

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