Triangle calculator

Please enter what you know about the triangle:
You have entered side a, b and c.

Obtuse scalene triangle.

Sides: a = 849   b = 927   c = 1320

Area: T = 391414.8422049
Perimeter: p = 3096
Semiperimeter: s = 1548

Angle ∠ A = α = 39.77435453316° = 39°46'25″ = 0.69441793212 rad
Angle ∠ B = β = 44.30992617798° = 44°18'33″ = 0.77333425072 rad
Angle ∠ C = γ = 95.91771928886° = 95°55'2″ = 1.67440708252 rad

Height: ha = 922.061087644
Height: hb = 844.4766466125
Height: hc = 593.0532790983

Median: ma = 1058.614430653
Median: mb = 1008.349926985
Median: mc = 595.3769633085

Inradius: r = 252.8521965148
Circumradius: R = 663.5355364782

Vertex coordinates: A[1320; 0] B[0; 0] C[607.5277272727; 593.0532790983]
Centroid: CG[642.5099090909; 197.6844263661]
Coordinates of the circumscribed circle: U[660; -68.40545343295]
Coordinates of the inscribed circle: I[621; 252.8521965148]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 140.2266454668° = 140°13'35″ = 0.69441793212 rad
∠ B' = β' = 135.691073822° = 135°41'27″ = 0.77333425072 rad
∠ C' = γ' = 84.08328071114° = 84°4'58″ = 1.67440708252 rad

How did we calculate this triangle?

1. Input data entered: side a, b and c. 2. The triangle circumference is the sum of the lengths of its three sides 3. Semiperimeter of the triangle 4. The triangle area using Heron's formula 5. Calculate the heights of the triangle from its area. 6. Calculation of the inner angles of the triangle using a Law of Cosines     