9 18 26 triangle

Obtuse scalene triangle.

Sides: a = 9   b = 18   c = 26

Area: T = 44.39552418622
Perimeter: p = 53
Semiperimeter: s = 26.5

Angle ∠ A = α = 10.93766341702° = 10°56'12″ = 0.19108802754 rad
Angle ∠ B = β = 22.29994025333° = 22°17'58″ = 0.38991979954 rad
Angle ∠ C = γ = 146.7643963296° = 146°45'50″ = 2.56215143828 rad

Height: ha = 9.86656093027
Height: hb = 4.93328046514
Height: hc = 3.41550186048

Median: ma = 21.90331961138
Median: mb = 17.24881883107
Median: mc = 5.78879184514

Inradius: r = 1.67552921457
Circumradius: R = 23.71987580432

Vertex coordinates: A[26; 0] B[0; 0] C[8.32769230769; 3.41550186048]
Centroid: CG[11.44223076923; 1.13883395349]
Coordinates of the circumscribed circle: U[13; -19.8398837746]
Coordinates of the inscribed circle: I[8.5; 1.67552921457]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 169.063336583° = 169°3'48″ = 0.19108802754 rad
∠ B' = β' = 157.7010597467° = 157°42'2″ = 0.38991979954 rad
∠ C' = γ' = 33.23660367035° = 33°14'10″ = 2.56215143828 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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