8 9 13 triangle

Obtuse scalene triangle.

Sides: a = 8   b = 9   c = 13

Area: T = 35.49664786986
Perimeter: p = 30
Semiperimeter: s = 15

Angle ∠ A = α = 37.35768519729° = 37°21'25″ = 0.65220000651 rad
Angle ∠ B = β = 43.04990798002° = 43°2'57″ = 0.75113481825 rad
Angle ∠ C = γ = 99.59440682269° = 99°35'39″ = 1.7388244406 rad

Height: ha = 8.87441196746
Height: hb = 7.88881063775
Height: hc = 5.46109967229

Median: ma = 10.44403065089
Median: mb = 9.81107084352
Median: mc = 5.5

Inradius: r = 2.36664319132
Circumradius: R = 6.59222031869

Vertex coordinates: A[13; 0] B[0; 0] C[5.84661538462; 5.46109967229]
Centroid: CG[6.28220512821; 1.8220332241]
Coordinates of the circumscribed circle: U[6.5; -1.09987005311]
Coordinates of the inscribed circle: I[6; 2.36664319132]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 142.6433148027° = 142°38'35″ = 0.65220000651 rad
∠ B' = β' = 136.95109202° = 136°57'3″ = 0.75113481825 rad
∠ C' = γ' = 80.40659317731° = 80°24'21″ = 1.7388244406 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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