9 14 20 triangle

Obtuse scalene triangle.

Sides: a = 9   b = 14   c = 20

Area: T = 54.98657936198
Perimeter: p = 43
Semiperimeter: s = 21.5

Angle ∠ A = α = 23.12660741872° = 23°7'34″ = 0.40436261376 rad
Angle ∠ B = β = 37.65884620062° = 37°39'30″ = 0.65772641532 rad
Angle ∠ C = γ = 119.2155463807° = 119°12'56″ = 2.08107023627 rad

Height: ha = 12.21990652488
Height: hb = 7.85551133743
Height: hc = 5.4998579362

Median: ma = 16.66658333125
Median: mb = 13.83883525031
Median: mc = 6.2054836823

Inradius: r = 2.5577478773
Circumradius: R = 11.45875049031

Vertex coordinates: A[20; 0] B[0; 0] C[7.125; 5.4998579362]
Centroid: CG[9.04216666667; 1.83328597873]
Coordinates of the circumscribed circle: U[10; -5.59223535837]
Coordinates of the inscribed circle: I[7.5; 2.5577478773]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 156.8743925813° = 156°52'26″ = 0.40436261376 rad
∠ B' = β' = 142.3421537994° = 142°20'30″ = 0.65772641532 rad
∠ C' = γ' = 60.78545361934° = 60°47'4″ = 2.08107023627 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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