# Triangle calculator SSS - result

Please enter the triangle sides:

### Equilateral triangle.

Sides: a = 36.89   b = 36.89   c = 36.89

Area: T = 589.2754904951
Perimeter: p = 110.67
Semiperimeter: s = 55.335

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

Height: ha = 31.94876771456
Height: hb = 31.94876771456
Height: hc = 31.94876771456

Median: ma = 31.94876771456
Median: mb = 31.94876771456
Median: mc = 31.94876771456

Inradius: r = 10.64992257152
Circumradius: R = 21.29884514304

Vertex coordinates: A[36.89; 0] B[0; 0] C[18.445; 31.94876771456]
Centroid: CG[18.445; 10.64992257152]
Coordinates of the circumscribed circle: U[18.445; 10.64992257152]
Coordinates of the inscribed circle: I[18.445; 10.64992257152]

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    