Acute scalene triangle.

Sides: a = 17   b = 20   c = 25

Area: T = 169.2455383984
Perimeter: p = 62
Semiperimeter: s = 31

Angle ∠ A = α = 42.60882175298° = 42°36'30″ = 0.74436536843 rad
Angle ∠ B = β = 52.79223196383° = 52°47'32″ = 0.92113997975 rad
Angle ∠ C = γ = 84.59994628319° = 84°35'58″ = 1.47765391718 rad

Height: h_a = 19.91112216452
Height: h_b = 16.92545383984
Height: h_c = 13.54396307187

Median: m_a = 20.98221352584
Median: m_b = 18.89444436277
Median: m_c = 13.7220422734

Inradius: r = 5.46595285156
Circumradius: R = 12.55657338698

Vertex coordinates: A[25; 0] B[0; 0] C[10.28; 13.54396307187]
Centroid: CG[11.76; 4.51332102396]
Coordinates of the circumscribed circle: U[12.5; 1.18217161289]
Coordinates of the inscribed circle: I[11; 5.46595285156]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 137.392178247° = 137°23'30″ = 0.74436536843 rad
∠ B' = β' = 127.2087680362° = 127°12'28″ = 0.92113997975 rad
∠ C' = γ' = 95.40105371681° = 95°24'2″ = 1.47765391718 rad

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