Area: T = 84 Perimeter: p = 48 Semiperimeter: s = 24
Angle ∠ A = α = 28.07224869359° = 28°4'21″ = 0.49899573263 rad Angle ∠ B = β = 53.13301023542° = 53°7'48″ = 0.9277295218 rad Angle ∠ C = γ = 98.797741071° = 98°47'51″ = 1.72443401093 rad
Height: ha = 16.8 Height: hb = 9.88223529412 Height: hc = 8
Median: ma = 18.43990889146 Median: mb = 14.08801278403 Median: mc = 9.17987798753
Inradius: r = 3.5 Circumradius: R = 10.625
Vertex coordinates: A[21; 0] B[0; 0] C[6; 8] Centroid: CG[9; 2.66766666667] Coordinates of the circumscribed circle: U[10.5; -1.625] Coordinates of the inscribed circle: I[7; 3.5]
Exterior(or external, outer) angles of the triangle: ∠ A' = α' = 151.9287513064° = 151°55'39″ = 0.49899573263 rad ∠ B' = β' = 126.8769897646° = 126°52'12″ = 0.9277295218 rad ∠ C' = γ' = 81.203258929° = 81°12'9″ = 1.72443401093 rad