# Triangle calculator

Please enter what you know about the triangle:
You have entered side a, b and c.

### Obtuse scalene triangle.

Sides: a = 163   b = 52   c = 125

Area: T = 2513.742223022
Perimeter: p = 340
Semiperimeter: s = 170

Angle ∠ A = α = 129.3344458296° = 129°20'4″ = 2.25773121335 rad
Angle ∠ B = β = 14.28551411313° = 14°17'7″ = 0.24993227469 rad
Angle ∠ C = γ = 36.38804005731° = 36°22'49″ = 0.63549577732 rad

Height: ha = 30.84334629475
Height: hb = 96.68223934701
Height: hc = 40.22198756835

Median: ma = 50.22220071283
Median: mb = 142.9022064366
Median: mc = 103.5876920024

Inradius: r = 14.78767190013
Circumradius: R = 105.3710788148

Vertex coordinates: A[125; 0] B[0; 0] C[157.96; 40.22198756835]
Centroid: CG[94.32; 13.40766252278]
Coordinates of the circumscribed circle: U[62.5; 84.83436784242]
Coordinates of the inscribed circle: I[118; 14.78767190013]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 50.66655417044° = 50°39'56″ = 2.25773121335 rad
∠ B' = β' = 165.7154858869° = 165°42'53″ = 0.24993227469 rad
∠ C' = γ' = 143.6219599427° = 143°37'11″ = 0.63549577732 rad

# How did we calculate this triangle?

### 1. Input data entered: side a, b and c. ### 2. The triangle circumference is the sum of the lengths of its three sides ### 3. Semiperimeter of the triangle ### 4. The triangle area using Heron's formula ### 5. Calculate the heights of the triangle from its area. ### 6. Calculation of the inner angles of the triangle using a Law of Cosines ### 7. Inradius ### 8. Circumradius ### 9. 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.