Triangle calculator VC

Please enter the coordinates of the three vertices

Acute scalene triangle.

Sides: a = 7.07110678119   b = 6.08327625303   c = 7.81102496759

Area: T = 20.5
Perimeter: p = 20.96440800181
Semiperimeter: s = 10.4822040009

Angle ∠ A = α = 59.65767511158° = 59°39'24″ = 1.0411206728 rad
Angle ∠ B = β = 47.93656734464° = 47°56'8″ = 0.83766353308 rad
Angle ∠ C = γ = 72.40875754378° = 72°24'27″ = 1.26437505948 rad

Height: ha = 5.79882756057
Height: hb = 6.74403584795
Height: hc = 5.25495120772

Median: ma = 6.04215229868
Median: mb = 6.80107352544
Median: mc = 5.31550729064

Vertex coordinates: A[7; 6] B[1; 1] C[8; 0]
Centroid: CG[5.33333333333; 2.33333333333]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[1.76549236202; 1.95657261738]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 120.3433248884° = 120°20'36″ = 1.0411206728 rad
∠ B' = β' = 132.0644326554° = 132°3'52″ = 0.83766353308 rad
∠ C' = γ' = 107.5922424562° = 107°35'33″ = 1.26437505948 rad

How did we calculate this triangle?

1. We compute side a from coordinates using the Pythagorean theorem

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