# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 12.2   b = 11.7   c = 14.88

Area: T = 69.53552132001
Perimeter: p = 38.78
Semiperimeter: s = 19.39

Angle ∠ A = α = 53.01770535111° = 53°1'1″ = 0.92553221435 rad
Angle ∠ B = β = 50.00328393007° = 50°10″ = 0.87327141811 rad
Angle ∠ C = γ = 76.98801071881° = 76°58'48″ = 1.3443556329 rad

Height: ha = 11.39992152787
Height: hb = 11.88663612308
Height: hc = 9.34661308065

Median: ma = 11.91439498068
Median: mb = 12.28443274134
Median: mc = 9.35547528027

Inradius: r = 3.58661378649
Circumradius: R = 7.6366315121

Vertex coordinates: A[14.88; 0] B[0; 0] C[7.84215456989; 9.34661308065]
Centroid: CG[7.57438485663; 3.11553769355]
Coordinates of the circumscribed circle: U[7.44; 1.72203803727]
Coordinates of the inscribed circle: I[7.69; 3.58661378649]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 126.9832946489° = 126°58'59″ = 0.92553221435 rad
∠ B' = β' = 129.9977160699° = 129°59'50″ = 0.87327141811 rad
∠ C' = γ' = 103.0219892812° = 103°1'12″ = 1.3443556329 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    