# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 12   b = 18   c = 29

Area: T = 54.48333690221
Perimeter: p = 59
Semiperimeter: s = 29.5

Angle ∠ A = α = 12.04990235938° = 12°2'56″ = 0.21102951334 rad
Angle ∠ B = β = 18.24875267096° = 18°14'51″ = 0.31884794214 rad
Angle ∠ C = γ = 149.7033449697° = 149°42'12″ = 2.61328180988 rad

Height: ha = 9.08105615037
Height: hb = 6.05437076691
Height: hc = 3.75774737257

Median: ma = 23.37773394551
Median: mb = 20.28554627751
Median: mc = 4.87333971724

Inradius: r = 1.84768938652
Circumradius: R = 28.74327159536

Vertex coordinates: A[29; 0] B[0; 0] C[11.39765517241; 3.75774737257]
Centroid: CG[13.46655172414; 1.25224912419]
Coordinates of the circumscribed circle: U[14.5; -24.81772061359]
Coordinates of the inscribed circle: I[11.5; 1.84768938652]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 167.9510976406° = 167°57'4″ = 0.21102951334 rad
∠ B' = β' = 161.752247329° = 161°45'9″ = 0.31884794214 rad
∠ C' = γ' = 30.29765503033° = 30°17'48″ = 2.61328180988 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.