15 15 27 triangle

Obtuse isosceles triangle.

Sides: a = 15   b = 15   c = 27

Area: T = 88.26877036067
Perimeter: p = 57
Semiperimeter: s = 28.5

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 = 11.76990271476
Height: hb = 11.76990271476
Height: hc = 6.53883484153

Median: ma = 20.51221914968
Median: mb = 20.51221914968
Median: mc = 6.53883484153

Inradius: r = 3.09771124073
Circumradius: R = 17.20661800403

Vertex coordinates: A[27; 0] B[0; 0] C[13.5; 6.53883484153]
Centroid: CG[13.5; 2.17994494718]
Coordinates of the circumscribed circle: U[13.5; -10.6687831625]
Coordinates of the inscribed circle: I[13.5; 3.09771124073]

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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