# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 11.04   b = 12.2   c = 11.99

Area: T = 59.39549739528
Perimeter: p = 35.23
Semiperimeter: s = 17.615

Angle ∠ A = α = 54.32999958109° = 54°18' = 0.94877137107 rad
Angle ∠ B = β = 63.82198268995° = 63°49'11″ = 1.11438661074 rad
Angle ∠ C = γ = 61.88801772896° = 61°52'49″ = 1.08800128354 rad

Height: ha = 10.76599590494
Height: hb = 9.73768809759
Height: hc = 9.90774185076

Median: ma = 10.76224184085
Median: mb = 9.77880800774
Median: mc = 9.97109966904

Inradius: r = 3.37218407013
Circumradius: R = 6.79773307021

Vertex coordinates: A[11.99; 0] B[0; 0] C[4.87107964971; 9.90774185076]
Centroid: CG[5.6220265499; 3.30224728359]
Coordinates of the circumscribed circle: U[5.995; 3.20436978125]
Coordinates of the inscribed circle: I[5.415; 3.37218407013]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 125.7700004189° = 125°42' = 0.94877137107 rad
∠ B' = β' = 116.18801731° = 116°10'49″ = 1.11438661074 rad
∠ C' = γ' = 118.121982271° = 118°7'11″ = 1.08800128354 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    