# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse isosceles triangle.

Sides: a = 12.73   b = 8.06   c = 8.06

Area: T = 31.47332194685
Perimeter: p = 28.85
Semiperimeter: s = 14.425

Angle ∠ A = α = 104.3155386865° = 104°18'55″ = 1.82106469613 rad
Angle ∠ B = β = 37.84223065674° = 37°50'32″ = 0.66604728461 rad
Angle ∠ C = γ = 37.84223065674° = 37°50'32″ = 0.66604728461 rad

Height: ha = 4.94547320453
Height: hb = 7.8109731878
Height: hc = 7.8109731878

Median: ma = 4.94547320453
Median: mb = 9.86224211023
Median: mc = 9.86224211023

Inradius: r = 2.18218523028
Circumradius: R = 6.56989707152

Vertex coordinates: A[8.06; 0] B[0; 0] C[10.05329094293; 7.8109731878]
Centroid: CG[6.03876364764; 2.60332439593]
Coordinates of the circumscribed circle: U[4.03; 5.18875308439]
Coordinates of the inscribed circle: I[6.365; 2.18218523028]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 75.68546131348° = 75°41'5″ = 1.82106469613 rad
∠ B' = β' = 142.1587693433° = 142°9'28″ = 0.66604728461 rad
∠ C' = γ' = 142.1587693433° = 142°9'28″ = 0.66604728461 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.