# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 18   b = 21   c = 24

Area: T = 182.9988463108
Perimeter: p = 63
Semiperimeter: s = 31.5

Angle ∠ A = α = 46.56774634422° = 46°34'3″ = 0.81327555614 rad
Angle ∠ B = β = 57.91100487437° = 57°54'36″ = 1.01107210206 rad
Angle ∠ C = γ = 75.52224878141° = 75°31'21″ = 1.31881160717 rad

Height: ha = 20.33331625676
Height: hb = 17.42884250579
Height: hc = 15.25498719257

Median: ma = 20.67660731281
Median: mb = 18.43223085912
Median: mc = 15.44334452115

Inradius: r = 5.80994750193
Circumradius: R = 12.39435467079

Vertex coordinates: A[24; 0] B[0; 0] C[9.56325; 15.25498719257]
Centroid: CG[11.18875; 5.08332906419]
Coordinates of the circumscribed circle: U[12; 3.0988386677]
Coordinates of the inscribed circle: I[10.5; 5.80994750193]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 133.4332536558° = 133°25'57″ = 0.81327555614 rad
∠ B' = β' = 122.0989951256° = 122°5'24″ = 1.01107210206 rad
∠ C' = γ' = 104.4787512186° = 104°28'39″ = 1.31881160717 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.