Area: T = 56.43998005316 Perimeter: p = 45 Semiperimeter: s = 22.5
Angle ∠ A = α = 19.61659069161° = 19°36'57″ = 0.34223621615 rad Angle ∠ B = β = 42.17772350071° = 42°10'38″ = 0.73661316203 rad Angle ∠ C = γ = 118.2076858077° = 118°12'25″ = 2.06330988719 rad
Height: ha = 14.10999501329 Height: hb = 7.05499750664 Height: hc = 5.37114095744
Median: ma = 18.23545825288 Median: mb = 13.73295302177 Median: mc = 7.05333679898
Inradius: r = 2.50766578014 Circumradius: R = 11.91549357563
Vertex coordinates: A[21; 0] B[0; 0] C[5.92985714286; 5.37114095744] Centroid: CG[8.97661904762; 1.79904698581] Coordinates of the circumscribed circle: U[10.5; -5.63216688535] Coordinates of the inscribed circle: I[6.5; 2.50766578014]
Exterior(or external, outer) angles of the triangle: ∠ A' = α' = 160.3844093084° = 160°23'3″ = 0.34223621615 rad ∠ B' = β' = 137.8232764993° = 137°49'22″ = 0.73661316203 rad ∠ C' = γ' = 61.79331419232° = 61°47'35″ = 2.06330988719 rad