# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 537.95   b = 390.27   c = 675

Area: T = 104915.1439711
Perimeter: p = 1603.22
Semiperimeter: s = 801.61

Angle ∠ A = α = 52.87995002995° = 52°47'58″ = 0.92215251236 rad
Angle ∠ B = β = 35.3300151928° = 35°18'1″ = 0.61661038776 rad
Angle ∠ C = γ = 91.99003477725° = 91°54'1″ = 1.60439636524 rad

Height: ha = 390.0555357229
Height: hb = 537.6544135397
Height: hc = 310.8659673217

Median: ma = 481.2699452412
Median: mb = 578.2999172596
Median: mc = 327.0233221958

Inradius: r = 130.8810527576
Circumradius: R = 337.686572219

Vertex coordinates: A[675; 0] B[0; 0] C[439.0440392296; 310.8659673217]
Centroid: CG[371.3476797432; 103.6219891072]
Coordinates of the circumscribed circle: U[337.5; -11.1988078908]
Coordinates of the inscribed circle: I[411.34; 130.8810527576]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 127.22004997° = 127°12'2″ = 0.92215251236 rad
∠ B' = β' = 144.7699848072° = 144°41'59″ = 0.61661038776 rad
∠ C' = γ' = 88.10996522275° = 88°5'59″ = 1.60439636524 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    