19 28 28 triangle
Acute isosceles triangle.
Sides: a = 19 b = 28 c = 28Area: T = 250.222177663
Perimeter: p = 75
Semiperimeter: s = 37.5
Angle ∠ A = α = 39.66767238177° = 39°40' = 0.69223149341 rad
Angle ∠ B = β = 70.16766380911° = 70°10' = 1.22546388597 rad
Angle ∠ C = γ = 70.16766380911° = 70°10' = 1.22546388597 rad
Height: ha = 26.33991343821
Height: hb = 17.8732984045
Height: hc = 17.8732984045
Median: ma = 26.33991343821
Median: mb = 19.40436079119
Median: mc = 19.40436079119
Inradius: r = 6.67325807101
Circumradius: R = 14.88327973734
Vertex coordinates: A[28; 0] B[0; 0] C[6.44664285714; 17.8732984045]
Centroid: CG[11.48221428571; 5.95876613483]
Coordinates of the circumscribed circle: U[14; 5.05495205374]
Coordinates of the inscribed circle: I[9.5; 6.67325807101]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 140.3333276182° = 140°20' = 0.69223149341 rad
∠ B' = β' = 109.8333361909° = 109°50' = 1.22546388597 rad
∠ C' = γ' = 109.8333361909° = 109°50' = 1.22546388597 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
