Triangle calculator

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

Obtuse scalene triangle.

Sides: a = 4.65   b = 3.36   c = 5.78

Area: T = 7.811101462
Perimeter: p = 13.79
Semiperimeter: s = 6.895

Angle ∠ A = α = 53.55220404687° = 53°33'7″ = 0.93546594273 rad
Angle ∠ B = β = 35.53879143752° = 35°32'16″ = 0.62202536151 rad
Angle ∠ C = γ = 90.9110045156° = 90°54'36″ = 1.58766796111 rad

Height: ha = 3.36595761807
Height: hb = 4.64994134643
Height: hc = 2.70327732249

Median: ma = 4.11662331081
Median: mb = 4.96992101988
Median: mc = 2.84767437538

Inradius: r = 1.13328520116
Circumradius: R = 2.89903645811

Vertex coordinates: A[5.78; 0] B[0; 0] C[3.7843849481; 2.70327732249]
Centroid: CG[3.1887949827; 0.90109244083]
Coordinates of the circumscribed circle: U[2.89; -0.04659065522]
Coordinates of the inscribed circle: I[3.535; 1.13328520116]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 126.4487959531° = 126°26'53″ = 0.93546594273 rad
∠ B' = β' = 144.4622085625° = 144°27'44″ = 0.62202536151 rad
∠ C' = γ' = 89.0989954844° = 89°5'24″ = 1.58766796111 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     