Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 100   b = 90   c = 11.64

Area: T = 282.4410932795
Perimeter: p = 201.64
Semiperimeter: s = 100.82

Angle ∠ A = α = 147.3769768489° = 147°22'11″ = 2.5722087678 rad
Angle ∠ B = β = 29.03217165556° = 29°1'54″ = 0.50766990414 rad
Angle ∠ C = γ = 3.59985149552° = 3°35'55″ = 0.06328059342 rad

Height: ha = 5.64988186559
Height: hb = 6.27664651732
Height: hc = 48.52993698961

Median: ma = 40.22111983909
Median: mb = 55.16110804825
Median: mc = 94.95332916754

Inradius: r = 2.80114375401
Circumradius: R = 92.72773527275

Vertex coordinates: A[11.64; 0] B[0; 0] C[87.43551202749; 48.52993698961]
Centroid: CG[33.02550400916; 16.1766456632]
Coordinates of the circumscribed circle: U[5.82; 92.54545273577]
Coordinates of the inscribed circle: I[10.82; 2.80114375401]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 32.63302315109° = 32°37'49″ = 2.5722087678 rad
∠ B' = β' = 150.9688283444° = 150°58'6″ = 0.50766990414 rad
∠ C' = γ' = 176.4011485045° = 176°24'5″ = 0.06328059342 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     