Triangle calculator SSS - result

Please enter the triangle sides:

Acute scalene triangle.

Sides: a = 100   b = 180   c = 205.91

Area: T = 90009.99999601
Perimeter: p = 485.91
Semiperimeter: s = 242.955

Angle ∠ A = α = 29.05550064476° = 29°3'18″ = 0.50771055267 rad
Angle ∠ B = β = 60.94766995342° = 60°56'48″ = 1.06437205751 rad
Angle ∠ C = γ = 89.99882940182° = 89°59'54″ = 1.57107665518 rad

Height: ha = 1809.99999992
Height: hb = 100.9999999557
Height: hc = 87.4176832558

Median: ma = 186.814398248
Median: mb = 134.5344248614
Median: mc = 102.9587602803

Inradius: r = 37.04438970015
Circumradius: R = 102.9555000046

Vertex coordinates: A[205.91; 0] B[0; 0] C[48.5622304162; 87.4176832558]
Centroid: CG[84.82441013873; 29.1398944186]
Coordinates of the circumscribed circle: U[102.955; 0.00330654851]
Coordinates of the inscribed circle: I[62.955; 37.04438970015]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 150.9454993552° = 150°56'42″ = 0.50771055267 rad
∠ B' = β' = 119.0533300466° = 119°3'12″ = 1.06437205751 rad
∠ C' = γ' = 90.00217059818° = 90°6″ = 1.57107665518 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     