5 5 9 triangle

Obtuse isosceles triangle.

Sides: a = 5   b = 5   c = 9

Area: T = 9.8087522623
Perimeter: p = 19
Semiperimeter: s = 9.5

Angle ∠ A = α = 25.84219327632° = 25°50'31″ = 0.45110268118 rad
Angle ∠ B = β = 25.84219327632° = 25°50'31″ = 0.45110268118 rad
Angle ∠ C = γ = 128.3166134474° = 128°18'58″ = 2.243953903 rad

Height: ha = 3.92330090492
Height: hb = 3.92330090492
Height: hc = 2.17994494718

Median: ma = 6.83773971656
Median: mb = 6.83773971656
Median: mc = 2.17994494718

Inradius: r = 1.03223708024
Circumradius: R = 5.73553933468

Vertex coordinates: A[9; 0] B[0; 0] C[4.5; 2.17994494718]
Centroid: CG[4.5; 0.72664831573]
Coordinates of the circumscribed circle: U[4.5; -3.5565943875]
Coordinates of the inscribed circle: I[4.5; 1.03223708024]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 154.1588067237° = 154°9'29″ = 0.45110268118 rad
∠ B' = β' = 154.1588067237° = 154°9'29″ = 0.45110268118 rad
∠ C' = γ' = 51.68438655263° = 51°41'2″ = 2.243953903 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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