# Triangle calculator

Please enter what you know about the triangle:

You have entered side a, b and c (as equilateral triangle).

### Equilateral triangle.

Sides: a = 1   b = 1   c = 1

Area: T = 0.43330127019
Perimeter: p = 3
Semiperimeter: s = 1.5

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

Height: ha = 0.86660254038
Height: hb = 0.86660254038
Height: hc = 0.86660254038

Median: ma = 0.86660254038
Median: mb = 0.86660254038
Median: mc = 0.86660254038

Inradius: r = 0.28986751346
Circumradius: R = 0.57773502692

Vertex coordinates: A[1; 0] B[0; 0] C[0.5; 0.86660254038]
Centroid: CG[0.5; 0.28986751346]
Coordinates of the circumscribed circle: U[0.5; 0.28986751346]
Coordinates of the inscribed circle: I[0.5; 0.28986751346]

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?

### 9. Calculation of medians

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See more informations about triangles or more information about solving triangles.