13 16 26 triangle

Obtuse scalene triangle.

Sides: a = 13   b = 16   c = 26

Area: T = 82.93663460734
Perimeter: p = 55
Semiperimeter: s = 27.5

Angle ∠ A = α = 23.4998960633° = 23°29'56″ = 0.41101342338 rad
Angle ∠ B = β = 29.39897316548° = 29°23'23″ = 0.51329475837 rad
Angle ∠ C = γ = 127.1111307712° = 127°6'41″ = 2.21985108361 rad

Height: ha = 12.75994378574
Height: hb = 10.36770432592
Height: hc = 6.38797189287

Median: ma = 20.58551888502
Median: mb = 18.93440962288
Median: mc = 6.59554529791

Inradius: r = 3.01658671299
Circumradius: R = 16.30216586094

Vertex coordinates: A[26; 0] B[0; 0] C[11.32769230769; 6.38797189287]
Centroid: CG[12.44223076923; 2.12765729762]
Coordinates of the circumscribed circle: U[13; -9.83658565167]
Coordinates of the inscribed circle: I[11.5; 3.01658671299]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 156.5011039367° = 156°30'4″ = 0.41101342338 rad
∠ B' = β' = 150.6110268345° = 150°36'37″ = 0.51329475837 rad
∠ C' = γ' = 52.88986922878° = 52°53'19″ = 2.21985108361 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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