# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 218.5   b = 213.3   c = 212.55

Area: T = 19966.49547275
Perimeter: p = 644.35
Semiperimeter: s = 322.175

Angle ∠ A = α = 61.74396445159° = 61°44'23″ = 1.07875600758 rad
Angle ∠ B = β = 59.29989845824° = 59°17'56″ = 1.03549625241 rad
Angle ∠ C = γ = 58.96113709017° = 58°57'41″ = 1.02990700537 rad

Height: ha = 182.7659677139
Height: hb = 187.2155140436
Height: hc = 187.8765744319

Median: ma = 182.7611138511
Median: mb = 187.312164873
Median: mc = 187.9549978385

Inradius: r = 61.97440660432
Circumradius: R = 124.0344239143

Vertex coordinates: A[212.55; 0] B[0; 0] C[111.5576957187; 187.8765744319]
Centroid: CG[108.0365652395; 62.62552481062]
Coordinates of the circumscribed circle: U[106.275; 63.95440214123]
Coordinates of the inscribed circle: I[108.875; 61.97440660432]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 118.2660355484° = 118°15'37″ = 1.07875600758 rad
∠ B' = β' = 120.7011015418° = 120°42'4″ = 1.03549625241 rad
∠ C' = γ' = 121.0398629098° = 121°2'19″ = 1.02990700537 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.