# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 38   b = 34   c = 5.91

Area: T = 78.04773205139
Perimeter: p = 77.91
Semiperimeter: s = 38.955

Angle ∠ A = α = 129.0299472509° = 129°1'46″ = 2.25219891274 rad
Angle ∠ B = β = 44.03113124206° = 44°1'53″ = 0.76884913757 rad
Angle ∠ C = γ = 6.93992150701° = 6°56'21″ = 0.12111121505 rad

Height: ha = 4.10877537113
Height: hb = 4.59110188538
Height: hc = 26.41219527966

Median: ma = 15.3122218977
Median: mb = 21.22441383806
Median: mc = 35.93442173283

Inradius: r = 2.00435251062
Circumradius: R = 24.45986231459

Vertex coordinates: A[5.91; 0] B[0; 0] C[27.32204822335; 26.41219527966]
Centroid: CG[11.07768274112; 8.80439842655]
Coordinates of the circumscribed circle: U[2.955; 24.27994608918]
Coordinates of the inscribed circle: I[4.955; 2.00435251062]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 50.97105274908° = 50°58'14″ = 2.25219891274 rad
∠ B' = β' = 135.9698687579° = 135°58'7″ = 0.76884913757 rad
∠ C' = γ' = 173.061078493° = 173°3'39″ = 0.12111121505 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    