Acute scalene triangle.

Sides: a = 23   b = 28   c = 30

Area: T = 304.9977438514
Perimeter: p = 81
Semiperimeter: s = 40.5

Angle ∠ A = α = 46.56774634422° = 46°34'3″ = 0.81327555614 rad
Angle ∠ B = β = 62.13549067337° = 62°8'6″ = 1.08444587029 rad
Angle ∠ C = γ = 71.29876298241° = 71°17'51″ = 1.24443783893 rad

Height: h_a = 26.52215163925
Height: h_b = 21.78655313224
Height: h_c = 20.33331625676

Median: m_a = 26.64111336095
Median: m_b = 22.77105950735
Median: m_c = 20.77325780778

Inradius: r = 7.5310800951
Circumradius: R = 15.83661985712

Vertex coordinates: A[30; 0] B[0; 0] C[10.75; 20.33331625676]
Centroid: CG[13.58333333333; 6.77877208559]
Coordinates of the circumscribed circle: U[15; 5.07879114984]
Coordinates of the inscribed circle: I[12.5; 7.5310800951]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 133.4332536558° = 133°25'57″ = 0.81327555614 rad
∠ B' = β' = 117.8655093266° = 117°51'54″ = 1.08444587029 rad
∠ C' = γ' = 108.7022370176° = 108°42'9″ = 1.24443783893 rad

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