# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 2.74   b = 4   c = 2

Area: T = 2.49992491652
Perimeter: p = 8.74
Semiperimeter: s = 4.37

Angle ∠ A = α = 38.66884114611° = 38°40'6″ = 0.67548910965 rad
Angle ∠ B = β = 114.1987957057° = 114°11'53″ = 1.99331303497 rad
Angle ∠ C = γ = 27.13436314821° = 27°8'1″ = 0.47435712074 rad

Height: ha = 1.82442694637
Height: hb = 1.25496245826
Height: hc = 2.49992491652

Median: ma = 2.85501052612
Median: mb = 1.32443111417
Median: mc = 3.27992987055

Inradius: r = 0.57219105641
Circumradius: R = 2.19326585297

Vertex coordinates: A[2; 0] B[0; 0] C[-1.12331; 2.49992491652]
Centroid: CG[0.29223; 0.83330830551]
Coordinates of the circumscribed circle: U[1; 1.95113460554]
Coordinates of the inscribed circle: I[0.37; 0.57219105641]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 141.3321588539° = 141°19'54″ = 0.67548910965 rad
∠ B' = β' = 65.80220429432° = 65°48'7″ = 1.99331303497 rad
∠ C' = γ' = 152.8666368518° = 152°51'59″ = 0.47435712074 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    