9.3 4.6 12.2 triangle

Obtuse scalene triangle.

Sides: a = 9.3   b = 4.6   c = 12.2

Area: T = 18.748816241
Perimeter: p = 26.1
Semiperimeter: s = 13.05

Angle ∠ A = α = 41.92440935815° = 41°55'27″ = 0.73217134689 rad
Angle ∠ B = β = 19.29879463721° = 19°17'53″ = 0.33768127031 rad
Angle ∠ C = γ = 118.7787960046° = 118°46'41″ = 2.07330664816 rad

Height: ha = 4.03218628839
Height: hb = 8.15113749608
Height: hc = 3.07334692475

Median: ma = 7.96109986811
Median: mb = 10.60107075236
Median: mc = 4.07661501444

Inradius: r = 1.43766407977
Circumradius: R = 6.96595620705

Vertex coordinates: A[12.2; 0] B[0; 0] C[8.77774590164; 3.07334692475]
Centroid: CG[6.99224863388; 1.02444897492]
Coordinates of the circumscribed circle: U[6.1; -3.355044836]
Coordinates of the inscribed circle: I[8.45; 1.43766407977]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 138.0765906419° = 138°4'33″ = 0.73217134689 rad
∠ B' = β' = 160.7022053628° = 160°42'7″ = 0.33768127031 rad
∠ C' = γ' = 61.22220399536° = 61°13'19″ = 2.07330664816 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     