11 17 21 triangle

Obtuse scalene triangle.

Sides: a = 11   b = 17   c = 21

Area: T = 93.17882565838
Perimeter: p = 49
Semiperimeter: s = 24.5

Angle ∠ A = α = 31.46769762933° = 31°28'1″ = 0.5499202342 rad
Angle ∠ B = β = 53.77884533802° = 53°46'42″ = 0.93986110781 rad
Angle ∠ C = γ = 94.75545703266° = 94°45'16″ = 1.65437792335 rad

Height: ha = 16.94215011971
Height: hb = 10.96221478334
Height: hc = 8.87441196746

Median: ma = 18.29661744635
Median: mb = 14.44881832768
Median: mc = 9.7343961167

Inradius: r = 3.80331941463
Circumradius: R = 10.53662563756

Vertex coordinates: A[21; 0] B[0; 0] C[6.5; 8.87441196746]
Centroid: CG[9.16766666667; 2.95880398915]
Coordinates of the circumscribed circle: U[10.5; -0.87333260632]
Coordinates of the inscribed circle: I[7.5; 3.80331941463]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 148.5333023707° = 148°31'59″ = 0.5499202342 rad
∠ B' = β' = 126.222154662° = 126°13'18″ = 0.93986110781 rad
∠ C' = γ' = 85.24554296734° = 85°14'44″ = 1.65437792335 rad

Calculate another triangle




How did we calculate this triangle?

Now we know the lengths of all three sides of the triangle and the triangle is uniquely determined. Next we calculate another its characteristics - same procedure as calculation of the triangle from the known three sides SSS.


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