# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 38   b = 120   c = 125.87

Area: T = 22809.99999243
Perimeter: p = 283.87
Semiperimeter: s = 141.935

Angle ∠ A = α = 17.57216842119° = 17°34'18″ = 0.30766837446 rad
Angle ∠ B = β = 72.43329842633° = 72°25'59″ = 1.26441940624 rad
Angle ∠ C = γ = 89.99553315248° = 89°59'43″ = 1.57107148465 rad

Height: ha = 1209.999999602
Height: hb = 387.9999998739
Height: hc = 36.2287854015

Median: ma = 121.4933326771
Median: mb = 71.0198507799
Median: mc = 62.93879517859

Inradius: r = 16.06436910729
Circumradius: R = 62.93550002089

Vertex coordinates: A[125.87; 0] B[0; 0] C[11.46992019544; 36.2287854015]
Centroid: CG[45.78797339848; 12.07659513383]
Coordinates of the circumscribed circle: U[62.935; 0.00551279604]
Coordinates of the inscribed circle: I[21.935; 16.06436910729]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 162.4288315788° = 162°25'42″ = 0.30766837446 rad
∠ B' = β' = 107.5677015737° = 107°34'1″ = 1.26441940624 rad
∠ C' = γ' = 90.00546684752° = 90°17″ = 1.57107148465 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    