Isosceles triangle calculator (b)
Acute isosceles triangle.
Sides: a = 56.40658411448 b = 56.40658411448 c = 42.26Area: T = 1105.069910554
Perimeter: p = 155.0721682289
Semiperimeter: s = 77.53658411448
Angle ∠ A = α = 68° = 1.18768238914 rad
Angle ∠ B = β = 68° = 1.18768238914 rad
Angle ∠ C = γ = 44° = 0.76879448709 rad
Height: ha = 39.1832789694
Height: hb = 39.1832789694
Height: hc = 52.29985852127
Median: ma = 41.09896401641
Median: mb = 41.09896401641
Median: mc = 52.29985852127
Inradius: r = 14.25223649609
Circumradius: R = 30.41878296823
Vertex coordinates: A[42.26; 0] B[0; 0] C[21.13; 52.29985852127]
Centroid: CG[21.13; 17.43328617376]
Coordinates of the circumscribed circle: U[21.13; 21.88107555304]
Coordinates of the inscribed circle: I[21.13; 14.25223649609]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 112° = 1.18768238914 rad
∠ B' = β' = 112° = 1.18768238914 rad
∠ C' = γ' = 136° = 0.76879448709 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.
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

6. Inradius

7. Circumradius
