8 8 15 triangle

Obtuse isosceles triangle.

Sides: a = 8   b = 8   c = 15

Area: T = 20.87991163606
Perimeter: p = 31
Semiperimeter: s = 15.5

Angle ∠ A = α = 20.36441348063° = 20°21'51″ = 0.35554212017 rad
Angle ∠ B = β = 20.36441348063° = 20°21'51″ = 0.35554212017 rad
Angle ∠ C = γ = 139.2721730387° = 139°16'18″ = 2.43107502502 rad

Height: ha = 5.22197790902
Height: hb = 5.22197790902
Height: hc = 2.78438821814

Median: ma = 11.33657840488
Median: mb = 11.33657840488
Median: mc = 2.78438821814

Inradius: r = 1.34770397652
Circumradius: R = 11.49547393297

Vertex coordinates: A[15; 0] B[0; 0] C[7.5; 2.78438821814]
Centroid: CG[7.5; 0.92879607271]
Coordinates of the circumscribed circle: U[7.5; -8.71108571483]
Coordinates of the inscribed circle: I[7.5; 1.34770397652]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 159.6365865194° = 159°38'9″ = 0.35554212017 rad
∠ B' = β' = 159.6365865194° = 159°38'9″ = 0.35554212017 rad
∠ C' = γ' = 40.72882696126° = 40°43'42″ = 2.43107502502 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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