# 0.3 0.4 0.6 triangle

### Obtuse scalene triangle.

Sides: a = 0.3   b = 0.4   c = 0.6

Area: T = 0.05333268225
Perimeter: p = 1.3
Semiperimeter: s = 0.65

Angle ∠ A = α = 26.38443297494° = 26°23'4″ = 0.46604934251 rad
Angle ∠ B = β = 36.33660575146° = 36°20'10″ = 0.63441838408 rad
Angle ∠ C = γ = 117.2879612736° = 117°16'47″ = 2.04769153877 rad

Height: ha = 0.35655121501
Height: hb = 0.26766341126
Height: hc = 0.17877560751

Median: ma = 0.48773397172
Median: mb = 0.43301162634
Median: mc = 0.18770828693

Inradius: r = 0.08220412654
Circumradius: R = 0.33875412063

Vertex coordinates: A[0.6; 0] B[0; 0] C[0.24216666667; 0.17877560751]
Centroid: CG[0.28105555556; 0.0599252025]
Coordinates of the circumscribed circle: U[0.3; -0.15547063862]
Coordinates of the inscribed circle: I[0.25; 0.08220412654]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 153.6165670251° = 153°36'56″ = 0.46604934251 rad
∠ B' = β' = 143.6643942485° = 143°39'50″ = 0.63441838408 rad
∠ C' = γ' = 62.7220387264° = 62°43'13″ = 2.04769153877 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    