Triangle calculator

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

Acute scalene triangle.

Sides: a = 2.92   b = 2.52   c = 2.14

Area: T = 2.62985912862
Perimeter: p = 7.58
Semiperimeter: s = 3.79

Angle ∠ A = α = 77.12333591866° = 77°7'24″ = 1.3466056548 rad
Angle ∠ B = β = 57.27987907914° = 57°16'44″ = 10.9997034909 rad
Angle ∠ C = γ = 45.5987850022° = 45°35'52″ = 0.79658326147 rad

Height: ha = 1.88004049906
Height: hb = 2.08661835605
Height: hc = 2.45766273703

Median: ma = 1.82657601157
Median: mb = 2.22883177511
Median: mc = 2.50986849145

Inradius: r = 0.69435597061
Circumradius: R = 1.49876630337

Vertex coordinates: A[2.14; 0] B[0; 0] C[1.5788411215; 2.45766273703]
Centroid: CG[1.2399470405; 0.81988757901]
Coordinates of the circumscribed circle: U[1.07; 1.04879000727]
Coordinates of the inscribed circle: I[1.27; 0.69435597061]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 102.8776640813° = 102°52'36″ = 1.3466056548 rad
∠ B' = β' = 122.7211209209° = 122°43'16″ = 10.9997034909 rad
∠ C' = γ' = 134.4022149978° = 134°24'8″ = 0.79658326147 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     