# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 200   b = 180   c = 25.12

Area: T = 1440.762164638
Perimeter: p = 405.12
Semiperimeter: s = 202.56

Angle ∠ A = α = 140.4110738478° = 140°24'39″ = 2.45106296916 rad
Angle ∠ B = β = 34.9988263591° = 34°59'54″ = 0.61108349321 rad
Angle ∠ C = γ = 4.59109979312° = 4°35'28″ = 0.08801280299 rad

Height: ha = 14.40876164638
Height: hb = 16.00884627376
Height: hc = 114.7110322164

Median: ma = 80.71986917634
Median: mb = 110.5243785675
Median: mc = 189.8487956007

Inradius: r = 7.11327648419
Circumradius: R = 156.9177003286

Vertex coordinates: A[25.12; 0] B[0; 0] C[163.834388535; 114.7110322164]
Centroid: CG[62.98546284501; 38.23767740547]
Coordinates of the circumscribed circle: U[12.56; 156.4143529851]
Coordinates of the inscribed circle: I[22.56; 7.11327648419]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 39.58992615221° = 39°35'21″ = 2.45106296916 rad
∠ B' = β' = 145.0021736409° = 145°6″ = 0.61108349321 rad
∠ C' = γ' = 175.4099002069° = 175°24'32″ = 0.08801280299 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    