# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 3.16   b = 13.6   c = 12.04

Area: T = 17.48109647331
Perimeter: p = 28.8
Semiperimeter: s = 14.4

Angle ∠ A = α = 12.32884665067° = 12°19'42″ = 0.21551723323 rad
Angle ∠ B = β = 113.2330033508° = 113°13'48″ = 1.97662368969 rad
Angle ∠ C = γ = 54.44114999852° = 54°26'29″ = 0.95501834245 rad

Height: ha = 11.06439017298
Height: hb = 2.57107301078
Height: hc = 2.90438147397

Median: ma = 12.74661523606
Median: mb = 5.58987028907
Median: mc = 7.82551134177

Inradius: r = 1.21439558842
Circumradius: R = 7.43999211128

Vertex coordinates: A[12.04; 0] B[0; 0] C[-1.24663787375; 2.90438147397]
Centroid: CG[3.59878737542; 0.96879382466]
Coordinates of the circumscribed circle: U[6.02; 4.30333048318]
Coordinates of the inscribed circle: I[0.8; 1.21439558842]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 167.6721533493° = 167°40'18″ = 0.21551723323 rad
∠ B' = β' = 66.77699664919° = 66°46'12″ = 1.97662368969 rad
∠ C' = γ' = 125.5598500015° = 125°33'31″ = 0.95501834245 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    