# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 12.35   b = 8.75   c = 5.25

Area: T = 19.52435396681
Perimeter: p = 26.35
Semiperimeter: s = 13.175

Angle ∠ A = α = 121.788784681° = 121°47'16″ = 2.12655989158 rad
Angle ∠ B = β = 37.03297679628° = 37°1'47″ = 0.64662913722 rad
Angle ∠ C = γ = 21.1822385227° = 21°10'57″ = 0.37697023656 rad

Height: ha = 3.16217068288
Height: hb = 4.46325233527
Height: hc = 7.43875389212

Median: ma = 3.7332542699
Median: mb = 8.42203251125
Median: mc = 10.37655421545

Inradius: r = 1.48218625934
Circumradius: R = 7.26546678656

Vertex coordinates: A[5.25; 0] B[0; 0] C[9.85992857143; 7.43875389212]
Centroid: CG[5.03664285714; 2.47991796404]
Coordinates of the circumscribed circle: U[2.625; 6.77438300981]
Coordinates of the inscribed circle: I[4.425; 1.48218625934]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 58.21221531898° = 58°12'44″ = 2.12655989158 rad
∠ B' = β' = 142.9770232037° = 142°58'13″ = 0.64662913722 rad
∠ C' = γ' = 158.8187614773° = 158°49'3″ = 0.37697023656 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.