# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 11   b = 21   c = 30

Area: T = 78.74400787401
Perimeter: p = 62
Semiperimeter: s = 31

Angle ∠ A = α = 14.47656484197° = 14°28'32″ = 0.25326477263 rad
Angle ∠ B = β = 28.50435101171° = 28°30'13″ = 0.49774800999 rad
Angle ∠ C = γ = 137.0210841463° = 137°1'15″ = 2.39114648274 rad

Height: ha = 14.31663779527
Height: hb = 7.49990551181
Height: hc = 5.24993385827

Median: ma = 25.30331618578
Median: mb = 20.00662490237
Median: mc = 7.48333147735

Inradius: r = 2.544000254
Circumradius: R = 22.00327720028

Vertex coordinates: A[30; 0] B[0; 0] C[9.66766666667; 5.24993385827]
Centroid: CG[13.22222222222; 1.75497795276]
Coordinates of the circumscribed circle: U[15; -16.09772660973]
Coordinates of the inscribed circle: I[10; 2.544000254]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 165.524435158° = 165°31'28″ = 0.25326477263 rad
∠ B' = β' = 151.4966489883° = 151°29'47″ = 0.49774800999 rad
∠ C' = γ' = 42.97991585368° = 42°58'45″ = 2.39114648274 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 ### 6. Inradius ### 7. Circumradius ### 8. Calculation of medians #### Look also our friend's collection of math examples and problems:

See more informations about triangles or more information about solving triangles.