# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 19   b = 28   c = 28

Area: 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

# 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 ### 6. Inradius ### 7. Circumradius ### 8. Calculation of medians #### Look also our friend's collection of math examples and problems:

See more informations about triangles or more information about solving triangles.