# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 12.81   b = 14.32   c = 6.4

Area: T = 40.99219999697
Perimeter: p = 33.53
Semiperimeter: s = 16.765

Angle ∠ A = α = 63.45110808894° = 63°27'4″ = 1.10774302755 rad
Angle ∠ B = β = 90.0022201426° = 90°8″ = 1.57108347489 rad
Angle ∠ C = γ = 26.54767176847° = 26°32'48″ = 0.46333276292 rad

Height: ha = 6.43999999953
Height: hb = 5.72551396606
Height: hc = 12.81099999905

Median: ma = 9.05546769683
Median: mb = 7.16597800246
Median: mc = 13.20437589345

Inradius: r = 2.44550939439
Circumradius: R = 7.16600000053

Vertex coordinates: A[6.4; 0] B[0; 0] C[-00.0004921875; 12.81099999905]
Centroid: CG[2.13331692708; 4.27699999968]
Coordinates of the circumscribed circle: U[3.2; 6.40551229555]
Coordinates of the inscribed circle: I[2.445; 2.44550939439]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 116.5498919111° = 116°32'56″ = 1.10774302755 rad
∠ B' = β' = 89.9987798574° = 89°59'52″ = 1.57108347489 rad
∠ C' = γ' = 153.4533282315° = 153°27'12″ = 0.46333276292 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.