# Triangle calculator

Please enter what you know about the triangle:
You have entered side a, b and c.

### Obtuse scalene triangle.

Sides: a = 54   b = 71   c = 44

Area: T = 1187.065999743
Perimeter: p = 169
Semiperimeter: s = 84.5

Angle ∠ A = α = 49.46108115181° = 49°27'39″ = 0.86332540117 rad
Angle ∠ B = β = 92.27994106372° = 92°16'46″ = 1.61105795474 rad
Angle ∠ C = γ = 38.26597778448° = 38°15'35″ = 0.66877590945 rad

Height: ha = 43.965518509
Height: hb = 33.43883097868
Height: hc = 53.95772726105

Median: ma = 52.5310943262
Median: mb = 34.14330812904
Median: mc = 59.11442960713

Inradius: r = 14.04880473069
Circumradius: R = 35.52881115456

Vertex coordinates: A[44; 0] B[0; 0] C[-2.14877272727; 53.95772726105]
Centroid: CG[13.95107575758; 17.98657575368]
Coordinates of the circumscribed circle: U[22; 27.89770735023]
Coordinates of the inscribed circle: I[13.5; 14.04880473069]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 130.5399188482° = 130°32'21″ = 0.86332540117 rad
∠ B' = β' = 87.72105893628° = 87°43'14″ = 1.61105795474 rad
∠ C' = γ' = 141.7440222155° = 141°44'25″ = 0.66877590945 rad

# How did we calculate this triangle?

### 1. Input data entered: side a, b and c. ### 2. The triangle circumference is the sum of the lengths of its three sides ### 3. Semiperimeter of the triangle ### 4. The triangle area using Heron's formula ### 5. Calculate the heights of the triangle from its area. ### 6. Calculation of the inner angles of the triangle using a Law of Cosines    