# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 200   b = 180   c = 302.54

Area: T = 173533.0001397
Perimeter: p = 682.54
Semiperimeter: s = 341.27

Angle ∠ A = α = 39.59113632734° = 39°35'29″ = 0.69109996445 rad
Angle ∠ B = β = 355.0000430814° = 35° = 0.61108659901 rad
Angle ∠ C = γ = 105.4098593645° = 105°24'31″ = 1.8439727019 rad

Height: ha = 173.5330001397
Height: hb = 192.8111112663
Height: hc = 114.7155410456

Median: ma = 227.9598824791
Median: mb = 240.1365848636
Median: mc = 115.4010983965

Inradius: r = 50.84883023404
Circumradius: R = 156.9110043109

Vertex coordinates: A[302.54; 0] B[0; 0] C[163.8330322602; 114.7155410456]
Centroid: CG[155.4576774201; 38.23884701521]
Coordinates of the circumscribed circle: U[151.27; -41.69111109064]
Coordinates of the inscribed circle: I[161.27; 50.84883023404]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 140.4098636727° = 140°24'31″ = 0.69109996445 rad
∠ B' = β' = 1454.999956919° = 145° = 0.61108659901 rad
∠ C' = γ' = 74.59114063547° = 74°35'29″ = 1.8439727019 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    