# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 19.04   b = 18.75   c = 3.31

Area: T = 31.03112499909
Perimeter: p = 41.1
Semiperimeter: s = 20.55

Angle ∠ A = α = 90.00113847923° = 90°5″ = 1.5710820496 rad
Angle ∠ B = β = 79.98771908433° = 79°59'14″ = 1.39660398396 rad
Angle ∠ C = γ = 10.01114243645° = 10°41″ = 0.1754732318 rad

Height: ha = 3.26595850831
Height: hb = 3.3109999999
Height: hc = 18.75499999945

Median: ma = 9.52199212182
Median: mb = 9.94222444649
Median: mc = 18.82329387982

Inradius: r = 1.51100364959
Circumradius: R = 9.52200000028

Vertex coordinates: A[3.31; 0] B[0; 0] C[3.31104531722; 18.75499999945]
Centroid: CG[2.20768177241; 6.25499999982]
Coordinates of the circumscribed circle: U[1.655; 9.37550400027]
Coordinates of the inscribed circle: I[1.8; 1.51100364959]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 89.99986152077° = 89°59'55″ = 1.5710820496 rad
∠ B' = β' = 100.0132809157° = 100°46″ = 1.39660398396 rad
∠ C' = γ' = 169.9898575636° = 169°59'19″ = 0.1754732318 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   