# Triangle calculator SSS - result

Please enter the triangle sides:

### Equilateral triangle.

Sides: a = 10.75   b = 10.75   c = 10.75

Area: T = 50.04400303624
Perimeter: p = 32.25
Semiperimeter: s = 16.125

Angle ∠ A = α = 60° = 1.04771975512 rad
Angle ∠ B = β = 60° = 1.04771975512 rad
Angle ∠ C = γ = 60° = 1.04771975512 rad

Height: ha = 9.31097730907
Height: hb = 9.31097730907
Height: hc = 9.31097730907

Median: ma = 9.31097730907
Median: mb = 9.31097730907
Median: mc = 9.31097730907

Inradius: r = 3.10332576969
Circumradius: R = 6.20765153938

Vertex coordinates: A[10.75; 0] B[0; 0] C[5.375; 9.31097730907]
Centroid: CG[5.375; 3.10332576969]
Coordinates of the circumscribed circle: U[5.375; 3.10332576969]
Coordinates of the inscribed circle: I[5.375; 3.10332576969]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 120° = 1.04771975512 rad
∠ B' = β' = 120° = 1.04771975512 rad
∠ C' = γ' = 120° = 1.04771975512 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    