# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 5.66   b = 2.24   c = 3.61

Area: T = 2.03303026411
Perimeter: p = 11.51
Semiperimeter: s = 5.755

Angle ∠ A = α = 149.8577494959° = 149°51'27″ = 2.61655066958 rad
Angle ∠ B = β = 11.46328019524° = 11°27'46″ = 0.22000636356 rad
Angle ∠ C = γ = 18.68797030883° = 18°40'47″ = 0.32660223222 rad

Height: ha = 0.71774214279
Height: hb = 1.81327702152
Height: hc = 1.12548214078

Median: ma = 1.00879434508
Median: mb = 4.61329654237
Median: mc = 3.90875023992

Inradius: r = 0.35327893382
Circumradius: R = 5.63657391103

Vertex coordinates: A[3.61; 0] B[0; 0] C[5.54771052632; 1.12548214078]
Centroid: CG[3.05223684211; 0.37549404693]
Coordinates of the circumscribed circle: U[1.805; 5.33988697604]
Coordinates of the inscribed circle: I[3.515; 0.35327893382]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 30.14325050407° = 30°8'33″ = 2.61655066958 rad
∠ B' = β' = 168.5377198048° = 168°32'14″ = 0.22000636356 rad
∠ C' = γ' = 161.3220296912° = 161°19'13″ = 0.32660223222 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    