16 21 28 triangle

Obtuse scalene triangle.

Sides: a = 16   b = 21   c = 28

Area: T = 166.5866126373
Perimeter: p = 65
Semiperimeter: s = 32.5

Angle ∠ A = α = 34.51548264544° = 34°30'53″ = 0.60223973624 rad
Angle ∠ B = β = 48.0476537002° = 48°2'48″ = 0.83985702649 rad
Angle ∠ C = γ = 97.43986365436° = 97°26'19″ = 1.70106250263 rad

Height: ha = 20.82332657966
Height: hb = 15.86553453689
Height: hc = 11.89990090267

Median: ma = 23.42200768573
Median: mb = 20.242228248
Median: mc = 12.34990890352

Inradius: r = 5.12657269653
Circumradius: R = 14.11988228048

Vertex coordinates: A[28; 0] B[0; 0] C[10.69664285714; 11.89990090267]
Centroid: CG[12.89988095238; 3.96663363422]
Coordinates of the circumscribed circle: U[14; -1.82878833095]
Coordinates of the inscribed circle: I[11.5; 5.12657269653]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 145.4855173546° = 145°29'7″ = 0.60223973624 rad
∠ B' = β' = 131.9533462998° = 131°57'12″ = 0.83985702649 rad
∠ C' = γ' = 82.56113634564° = 82°33'41″ = 1.70106250263 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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