# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 2.83   b = 5.1   c = 3.16

Area: T = 3.99772369137
Perimeter: p = 11.09
Semiperimeter: s = 5.545

Angle ∠ A = α = 29.7439552969° = 29°44'22″ = 0.51990531174 rad
Angle ∠ B = β = 116.625529665° = 116°37'31″ = 2.03554954177 rad
Angle ∠ C = γ = 33.63551503812° = 33°38'7″ = 0.58770441186 rad

Height: ha = 2.82549024125
Height: hb = 1.56875438877
Height: hc = 2.53298967808

Median: ma = 3.99994468368
Median: mb = 1.57994777618
Median: mc = 3.81095997165

Inradius: r = 0.72108723018
Circumradius: R = 2.85224879176

Vertex coordinates: A[3.16; 0] B[0; 0] C[-1.26882753165; 2.53298967808]
Centroid: CG[0.63105748945; 0.84332989269]
Coordinates of the circumscribed circle: U[1.58; 2.37549289084]
Coordinates of the inscribed circle: I[0.445; 0.72108723018]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 150.2660447031° = 150°15'38″ = 0.51990531174 rad
∠ B' = β' = 63.37547033502° = 63°22'29″ = 2.03554954177 rad
∠ C' = γ' = 146.3654849619° = 146°21'53″ = 0.58770441186 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    