Equilateral triangle calculator

Please enter one property of the equilateral triangle

Use symbols: a, h, T, p, r, R


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

Equilateral triangle.

Sides: a = 11.7   b = 11.7   c = 11.7

Area: T = 59.2755108762
Perimeter: p = 35.1
Semiperimeter: s = 17.55

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

Height: ha = 10.13224972243
Height: hb = 10.13224972243
Height: hc = 10.13224972243

Median: ma = 10.13224972243
Median: mb = 10.13224972243
Median: mc = 10.13224972243

Inradius: r = 3.37774990748
Circumradius: R = 6.75549981495

Vertex coordinates: A[11.7; 0] B[0; 0] C[5.85; 10.13224972243]
Centroid: CG[5.85; 3.37774990748]
Coordinates of the circumscribed circle: U[5.85; 3.37774990748]
Coordinates of the inscribed circle: I[5.85; 3.37774990748]

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

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How did we calculate this triangle?

1. Input data entered: side a b c (as equilateral triangle)


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