200 200 200 triangle

Equilateral triangle.

Sides: a = 200   b = 200   c = 200

Area: T = 17320.50880757
Perimeter: p = 600
Semiperimeter: s = 300

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

Height: ha = 173.2055080757
Height: hb = 173.2055080757
Height: hc = 173.2055080757

Median: ma = 173.2055080757
Median: mb = 173.2055080757
Median: mc = 173.2055080757

Inradius: r = 57.7355026919
Circumradius: R = 115.4770053838

Vertex coordinates: A[200; 0] B[0; 0] C[100; 173.2055080757]
Centroid: CG[100; 57.7355026919]
Coordinates of the circumscribed circle: U[100; 57.7355026919]
Coordinates of the inscribed circle: I[100; 57.7355026919]

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     