11 23 28 triangle

Obtuse scalene triangle.

Sides: a = 11   b = 23   c = 28

Area: T = 121.9843605456
Perimeter: p = 62
Semiperimeter: s = 31

Angle ∠ A = α = 22.26112954012° = 22°15'41″ = 0.38985329005 rad
Angle ∠ B = β = 52.38223203336° = 52°22'56″ = 0.91442439597 rad
Angle ∠ C = γ = 105.3566384265° = 105°21'23″ = 1.83988157934 rad

Height: ha = 22.17988373556
Height: hb = 10.60772700396
Height: hc = 8.71331146754

Median: ma = 25.02549875125
Median: mb = 17.89655301682
Median: mc = 11.35878166916

Inradius: r = 3.93549550147
Circumradius: R = 14.51883444397

Vertex coordinates: A[28; 0] B[0; 0] C[6.71442857143; 8.71331146754]
Centroid: CG[11.57114285714; 2.90443715585]
Coordinates of the circumscribed circle: U[14; -3.84547789623]
Coordinates of the inscribed circle: I[8; 3.93549550147]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 157.7398704599° = 157°44'19″ = 0.38985329005 rad
∠ B' = β' = 127.6187679666° = 127°37'4″ = 0.91442439597 rad
∠ C' = γ' = 74.64436157347° = 74°38'37″ = 1.83988157934 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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