18 19 19 triangle

Acute isosceles triangle.

Sides: a = 18   b = 19   c = 19

Area: T = 150.5998804776
Perimeter: p = 56
Semiperimeter: s = 28

Angle ∠ A = α = 56.54774272627° = 56°32'51″ = 0.98769387893 rad
Angle ∠ B = β = 61.72662863686° = 61°43'35″ = 1.07773269322 rad
Angle ∠ C = γ = 61.72662863686° = 61°43'35″ = 1.07773269322 rad

Height: ha = 16.73332005307
Height: hb = 15.85325057659
Height: hc = 15.85325057659

Median: ma = 16.73332005307
Median: mb = 15.88223801743
Median: mc = 15.88223801743

Inradius: r = 5.3798528742
Circumradius: R = 10.78769381992

Vertex coordinates: A[19; 0] B[0; 0] C[8.52663157895; 15.85325057659]
Centroid: CG[9.17554385965; 5.28441685886]
Coordinates of the circumscribed circle: U[9.5; 5.11096023049]
Coordinates of the inscribed circle: I[9; 5.3798528742]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 123.4532572737° = 123°27'9″ = 0.98769387893 rad
∠ B' = β' = 118.2743713631° = 118°16'25″ = 1.07773269322 rad
∠ C' = γ' = 118.2743713631° = 118°16'25″ = 1.07773269322 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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