# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 11   b = 13   c = 22

Area: T = 52.53657021463
Perimeter: p = 46
Semiperimeter: s = 23

Angle ∠ A = α = 21.55442815764° = 21°33'15″ = 0.37661931814 rad
Angle ∠ B = β = 25.73330865544° = 25°43'59″ = 0.44991270871 rad
Angle ∠ C = γ = 132.7132631869° = 132°42'45″ = 2.31662723851 rad

Height: ha = 9.55219458448
Height: hb = 8.08224157148
Height: hc = 4.77659729224

Median: ma = 17.21219144781
Median: mb = 16.13222658049
Median: mc = 4.89989794856

Inradius: r = 2.28441609629
Circumradius: R = 14.97107716442

Vertex coordinates: A[22; 0] B[0; 0] C[9.90990909091; 4.77659729224]
Centroid: CG[10.63663636364; 1.59219909741]
Coordinates of the circumscribed circle: U[11; -10.15549989475]
Coordinates of the inscribed circle: I[10; 2.28441609629]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 158.4465718424° = 158°26'45″ = 0.37661931814 rad
∠ B' = β' = 154.2676913446° = 154°16'1″ = 0.44991270871 rad
∠ C' = γ' = 47.28773681308° = 47°17'15″ = 2.31662723851 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    