# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 9   b = 24   c = 28

Area: T = 103.2287600476
Perimeter: p = 61
Semiperimeter: s = 30.5

Angle ∠ A = α = 17.89220755157° = 17°53'31″ = 0.31222756278 rad
Angle ∠ B = β = 55.01114518867° = 55°41″ = 0.96601309617 rad
Angle ∠ C = γ = 107.0966472598° = 107°5'47″ = 1.86991860641 rad

Height: ha = 22.93994667724
Height: hb = 8.60223000397
Height: hc = 7.3733400034

Median: ma = 25.68655990781
Median: mb = 16.98552877515
Median: mc = 11.51108644332

Inradius: r = 3.3854511491
Circumradius: R = 14.64772454366

Vertex coordinates: A[28; 0] B[0; 0] C[5.16107142857; 7.3733400034]
Centroid: CG[11.05435714286; 2.45878000113]
Coordinates of the circumscribed circle: U[14; -4.30660189131]
Coordinates of the inscribed circle: I[6.5; 3.3854511491]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 162.1087924484° = 162°6'29″ = 0.31222756278 rad
∠ B' = β' = 124.9898548113° = 124°59'19″ = 0.96601309617 rad
∠ C' = γ' = 72.90435274025° = 72°54'13″ = 1.86991860641 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   