# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 21   b = 23   c = 30

Area: T = 240.8655107477
Perimeter: p = 74
Semiperimeter: s = 37

Angle ∠ A = α = 44.2879544862° = 44°16'46″ = 0.77328238491 rad
Angle ∠ B = β = 49.87659654065° = 49°52'33″ = 0.8770499814 rad
Angle ∠ C = γ = 85.84444897315° = 85°50'40″ = 1.49882689905 rad

Height: ha = 22.94395340454
Height: hb = 20.94547919545
Height: hc = 16.05876738318

Median: ma = 24.58114971066
Median: mb = 23.22002155162
Median: mc = 16.12545154966

Inradius: r = 6.51098677697
Circumradius: R = 15.04395382625

Vertex coordinates: A[30; 0] B[0; 0] C[13.53333333333; 16.05876738318]
Centroid: CG[14.51111111111; 5.35325579439]
Coordinates of the circumscribed circle: U[15; 1.09898216132]
Coordinates of the inscribed circle: I[14; 6.51098677697]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 135.7220455138° = 135°43'14″ = 0.77328238491 rad
∠ B' = β' = 130.1244034594° = 130°7'27″ = 0.8770499814 rad
∠ C' = γ' = 94.15655102685° = 94°9'20″ = 1.49882689905 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.