Triangle calculator SSS - result

Please enter the triangle sides:

Acute isosceles triangle.

Sides: a = 17   b = 23   c = 23

Area: T = 181.6659537322
Perimeter: p = 63
Semiperimeter: s = 31.5

Angle ∠ A = α = 43.37876112363° = 43°22'39″ = 0.75770821377 rad
Angle ∠ B = β = 68.31111943819° = 68°18'40″ = 1.19222552579 rad
Angle ∠ C = γ = 68.31111943819° = 68°18'40″ = 1.19222552579 rad

Height: ha = 21.37217102732
Height: hb = 15.79664815063
Height: hc = 15.79664815063

Median: ma = 21.37217102732
Median: mb = 16.63658047596
Median: mc = 16.63658047596

Inradius: r = 5.76769694388
Circumradius: R = 12.37661737652

Vertex coordinates: A[23; 0] B[0; 0] C[6.28326086957; 15.79664815063]
Centroid: CG[9.76108695652; 5.26554938354]
Coordinates of the circumscribed circle: U[11.5; 4.5743803348]
Coordinates of the inscribed circle: I[8.5; 5.76769694388]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 136.6222388764° = 136°37'21″ = 0.75770821377 rad
∠ B' = β' = 111.6898805618° = 111°41'20″ = 1.19222552579 rad
∠ C' = γ' = 111.6898805618° = 111°41'20″ = 1.19222552579 rad

How did we calculate this triangle?

1. The triangle circumference is the sum of the lengths of its three sides 2. Semiperimeter of the triangle 3. The triangle area using Heron's formula 4. Calculate the heights of the triangle from its area. 5. Calculation of the inner angles of the triangle using a Law of Cosines     