# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 1.27   b = 3.78   c = 4.54

Area: T = 2.09215920275
Perimeter: p = 9.59
Semiperimeter: s = 4.795

Angle ∠ A = α = 14.10884619557° = 14°6'30″ = 0.24662391135 rad
Angle ∠ B = β = 46.51218462318° = 46°30'43″ = 0.81217848579 rad
Angle ∠ C = γ = 119.3879691812° = 119°22'47″ = 2.08435686821 rad

Height: ha = 3.29438457126
Height: hb = 1.10766624484
Height: hc = 0.92114061795

Median: ma = 4.12987740311
Median: mb = 2.74659333568
Median: mc = 1.67326476019

Inradius: r = 0.43662027169
Circumradius: R = 2.60550400501

Vertex coordinates: A[4.54; 0] B[0; 0] C[0.87440198238; 0.92114061795]
Centroid: CG[1.80546732746; 0.30771353932]
Coordinates of the circumscribed circle: U[2.27; -1.27880194296]
Coordinates of the inscribed circle: I[1.015; 0.43662027169]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 165.8921538044° = 165°53'30″ = 0.24662391135 rad
∠ B' = β' = 133.4888153768° = 133°29'17″ = 0.81217848579 rad
∠ C' = γ' = 60.62203081876° = 60°37'13″ = 2.08435686821 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    