4 18 19 triangle

Obtuse scalene triangle.

Sides: a = 4   b = 18   c = 19

Area: T = 35.61551302118
Perimeter: p = 41
Semiperimeter: s = 20.5

Angle ∠ A = α = 12.02113180101° = 12°1'17″ = 0.21098115797 rad
Angle ∠ B = β = 69.59331433428° = 69°35'35″ = 1.21546294881 rad
Angle ∠ C = γ = 98.38655386471° = 98°23'8″ = 1.71771515857 rad

Height: ha = 17.80875651059
Height: hb = 3.95772366902
Height: hc = 3.74989610749

Median: ma = 18.3988369493
Median: mb = 10.36882206767
Median: mc = 8.93302855497

Inradius: r = 1.7377323425
Circumradius: R = 9.60326603853

Vertex coordinates: A[19; 0] B[0; 0] C[1.39547368421; 3.74989610749]
Centroid: CG[6.7988245614; 1.25496536916]
Coordinates of the circumscribed circle: U[9.5; -1.44003879728]
Coordinates of the inscribed circle: I[2.5; 1.7377323425]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 167.979868199° = 167°58'43″ = 0.21098115797 rad
∠ B' = β' = 110.4076856657° = 110°24'25″ = 1.21546294881 rad
∠ C' = γ' = 81.61444613529° = 81°36'52″ = 1.71771515857 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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