900 900 900 triangle

Equilateral triangle.

Sides: a = 900   b = 900   c = 900

Area: T = 350740.2898533
Perimeter: p = 2700
Semiperimeter: s = 1350

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

Height: ha = 779.4232863406
Height: hb = 779.4232863406
Height: hc = 779.4232863406

Median: ma = 779.4232863406
Median: mb = 779.4232863406
Median: mc = 779.4232863406

Inradius: r = 259.8087621135
Circumradius: R = 519.6155242271

Vertex coordinates: A[900; 0] B[0; 0] C[450; 779.4232863406]
Centroid: CG[450; 259.8087621135]
Coordinates of the circumscribed circle: U[450; 259.8087621135]
Coordinates of the inscribed circle: I[450; 259.8087621135]

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     