# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse isosceles triangle.

Sides: a = 105.04   b = 105.04   c = 200.9

Area: T = 3084.975486486
Perimeter: p = 410.98
Semiperimeter: s = 205.49

Angle ∠ A = α = 177.0004693311° = 17°2″ = 0.29767141642 rad
Angle ∠ B = β = 177.0004693311° = 17°2″ = 0.29767141642 rad
Angle ∠ C = γ = 145.9999061338° = 145°59'57″ = 2.54881643252 rad

Height: ha = 58.73990492167
Height: hb = 58.73990492167
Height: hc = 30.71215466885

Median: ma = 151.4555456818
Median: mb = 151.4555456818
Median: mc = 30.71215466885

Inradius: r = 15.01327736866
Circumradius: R = 179.6329533346

Vertex coordinates: A[200.9; 0] B[0; 0] C[100.45; 30.71215466885]
Centroid: CG[100.45; 10.23771822295]
Coordinates of the circumscribed circle: U[100.45; -148.9187986658]
Coordinates of the inscribed circle: I[100.45; 15.01327736866]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 1632.999530669° = 162°59'58″ = 0.29767141642 rad
∠ B' = β' = 1632.999530669° = 162°59'58″ = 0.29767141642 rad
∠ C' = γ' = 34.00109386622° = 34°3″ = 2.54881643252 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    