140 247 360 triangle

Obtuse scalene triangle.

Sides: a = 140   b = 247   c = 360

Area: T = 12203.96332881
Perimeter: p = 747
Semiperimeter: s = 373.5

Angle ∠ A = α = 15.93218086017° = 15°55'55″ = 0.27880625159 rad
Angle ∠ B = β = 28.96655895447° = 28°57'56″ = 0.50655449073 rad
Angle ∠ C = γ = 135.1032601854° = 135°6'9″ = 2.35879852304 rad

Height: ha = 174.3422332687
Height: hb = 98.81875165029
Height: hc = 67.8799796045

Median: ma = 300.6733410863
Median: mb = 243.6143936383
Median: mc = 88.9077255047

Inradius: r = 32.67546005036
Circumradius: R = 255.0165516396

Vertex coordinates: A[360; 0] B[0; 0] C[122.48875; 67.8799796045]
Centroid: CG[160.8299166667; 22.6599932015]
Coordinates of the circumscribed circle: U[180; -180.6465823652]
Coordinates of the inscribed circle: I[126.5; 32.67546005036]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 164.0688191398° = 164°4'5″ = 0.27880625159 rad
∠ B' = β' = 151.0344410455° = 151°2'4″ = 0.50655449073 rad
∠ C' = γ' = 44.89773981463° = 44°53'51″ = 2.35879852304 rad

How did we calculate this triangle?

Now we know the lengths of all three sides of the triangle and the triangle is uniquely determined. Next we calculate another its characteristics - same procedure as calculation of the triangle from the known three sides SSS. 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     