Right scalene triangle.

Sides: a = 18.11107702763   b = 20.24884567313   c = 9.05553851381

Area: T = 82
Perimeter: p = 47.41546121457
Semiperimeter: s = 23.70773060729

Angle ∠ A = α = 63.43549488229° = 63°26'6″ = 1.10771487178 rad
Angle ∠ B = β = 90° = 1.57107963268 rad
Angle ∠ C = γ = 26.56550511771° = 26°33'54″ = 0.4643647609 rad

Height: h_a = 9.05553851381
Height: h_b = 8.09993826925
Height: h_c = 18.11107702763

Median: m_a = 12.80662484749
Median: m_b = 10.12442283657
Median: m_c = 18.66881547026

Inradius: r = 3.45988493415
Circumradius: R = 10.12442283657

Vertex coordinates: A[-2; 3] B[7; 4] C[5; 22]
Centroid: CG[3.33333333333; 9.66766666667]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[0; 3.45988493415]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 116.5655051177° = 116°33'54″ = 1.10771487178 rad
∠ B' = β' = 90° = 1.57107963268 rad
∠ C' = γ' = 153.4354948823° = 153°26'6″ = 0.4643647609 rad

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