Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 5.1   b = 5.83   c = 10.77

Area: T = 5.00554789981
Perimeter: p = 21.7
Semiperimeter: s = 10.85

Angle ∠ A = α = 9.17442675144° = 9°10'27″ = 0.16601211746 rad
Angle ∠ B = β = 10.50113868921° = 10°30'5″ = 0.18332837773 rad
Angle ∠ C = γ = 160.3244345593° = 160°19'28″ = 2.79881877017 rad

Height: ha = 1.96329329404
Height: hb = 1.71771454539
Height: hc = 0.93295225623

Median: ma = 8.27657718673
Median: mb = 7.90659613584
Median: mc = 1.00106123125

Inradius: r = 0.46113344699
Circumradius: R = 15.99436946157

Vertex coordinates: A[10.77; 0] B[0; 0] C[5.01545775302; 0.93295225623]
Centroid: CG[5.26215258434; 0.31098408541]
Coordinates of the circumscribed circle: U[5.385; -15.06598818873]
Coordinates of the inscribed circle: I[5.02; 0.46113344699]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 170.8265732486° = 170°49'33″ = 0.16601211746 rad
∠ B' = β' = 169.4998613108° = 169°29'55″ = 0.18332837773 rad
∠ C' = γ' = 19.67656544065° = 19°40'32″ = 2.79881877017 rad

How did we calculate this triangle?

1. The triangle circumference is the sum of the lengths of its three sides 2. Semiperimeter of the triangle 3. The triangle area using Heron's formula 4. Calculate the heights of the triangle from its area. 5. Calculation of the inner angles of the triangle using a Law of Cosines     