# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse isosceles triangle.

Sides: a = 5.2   b = 5.2   c = 10.28

Area: T = 4.0498545398
Perimeter: p = 20.68
Semiperimeter: s = 10.34

Angle ∠ A = α = 8.71222446146° = 8°42'44″ = 0.15220573538 rad
Angle ∠ B = β = 8.71222446146° = 8°42'44″ = 0.15220573538 rad
Angle ∠ C = γ = 162.5765510771° = 162°34'32″ = 2.83774779461 rad

Height: ha = 1.55771328454
Height: hb = 1.55771328454
Height: hc = 0.78876547467

Median: ma = 7.72200518133
Median: mb = 7.72200518133
Median: mc = 0.78876547467

Inradius: r = 0.39215421081
Circumradius: R = 17.16548810048

Vertex coordinates: A[10.28; 0] B[0; 0] C[5.14; 0.78876547467]
Centroid: CG[5.14; 0.26325515822]
Coordinates of the circumscribed circle: U[5.14; -16.37772262581]
Coordinates of the inscribed circle: I[5.14; 0.39215421081]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 171.2887755385° = 171°17'16″ = 0.15220573538 rad
∠ B' = β' = 171.2887755385° = 171°17'16″ = 0.15220573538 rad
∠ C' = γ' = 17.42444892291° = 17°25'28″ = 2.83774779461 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.