11 20 25 triangle

Obtuse scalene triangle.

Sides: a = 11   b = 20   c = 25

Area: T = 106.8833113727
Perimeter: p = 56
Semiperimeter: s = 28

Angle ∠ A = α = 25.31110651555° = 25°18'40″ = 0.44217614242 rad
Angle ∠ B = β = 51.01769167401° = 51°1'1″ = 0.89904131713 rad
Angle ∠ C = γ = 103.6722018104° = 103°40'19″ = 1.80994180581 rad

Height: ha = 19.43332934049
Height: hb = 10.68883113727
Height: hc = 8.55106490982

Median: ma = 21.9660191256
Median: mb = 16.52327116419
Median: mc = 10.21102889283

Inradius: r = 3.81772540617
Circumradius: R = 12.86545204285

Vertex coordinates: A[25; 0] B[0; 0] C[6.92; 8.55106490982]
Centroid: CG[10.64; 2.85502163661]
Coordinates of the circumscribed circle: U[12.5; -3.04107048285]
Coordinates of the inscribed circle: I[8; 3.81772540617]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 154.6898934845° = 154°41'20″ = 0.44217614242 rad
∠ B' = β' = 128.983308326° = 128°58'59″ = 0.89904131713 rad
∠ C' = γ' = 76.32879818956° = 76°19'41″ = 1.80994180581 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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