Triangle calculator SSS - result

Please enter the triangle sides:

Acute scalene triangle.

Sides: a = 19   b = 22   c = 28

Area: T = 208.4432887861
Perimeter: p = 69
Semiperimeter: s = 34.5

Angle ∠ A = α = 42.59111780237° = 42°35'28″ = 0.74333562888 rad
Angle ∠ B = β = 51.59332135275° = 51°35'36″ = 0.99004714477 rad
Angle ∠ C = γ = 85.81656084488° = 85°48'56″ = 1.4987764917 rad

Height: ha = 21.9411356617
Height: hb = 18.94993534419
Height: hc = 14.88987777044

Median: ma = 23.31884476327
Median: mb = 21.24985293609
Median: mc = 15.05499169433

Inradius: r = 6.04218228366
Circumradius: R = 14.03774182589

Vertex coordinates: A[28; 0] B[0; 0] C[11.80435714286; 14.88987777044]
Centroid: CG[13.26878571429; 4.96329259015]
Coordinates of the circumscribed circle: U[14; 1.02442613801]
Coordinates of the inscribed circle: I[12.5; 6.04218228366]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 137.4098821976° = 137°24'32″ = 0.74333562888 rad
∠ B' = β' = 128.4076786473° = 128°24'24″ = 0.99004714477 rad
∠ C' = γ' = 94.18443915512° = 94°11'4″ = 1.4987764917 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     