# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 2.12   b = 1.5   c = 1.5

Area: T = 1.12549991289
Perimeter: p = 5.12
Semiperimeter: s = 2.56

Angle ∠ A = α = 89.92986985671° = 89°55'43″ = 1.5769551882 rad
Angle ∠ B = β = 45.03656507165° = 45°2'8″ = 0.78660203858 rad
Angle ∠ C = γ = 45.03656507165° = 45°2'8″ = 0.78660203858 rad

Height: ha = 1.06113199329
Height: hb = 1.54999988385
Height: hc = 1.54999988385

Median: ma = 1.06113199329
Median: mb = 1.67662159765
Median: mc = 1.67662159765

Inradius: r = 0.43994527847
Circumradius: R = 1.06600008208

Vertex coordinates: A[1.5; 0] B[0; 0] C[1.49881333333; 1.54999988385]
Centroid: CG[0.99993777778; 0.54999996128]
Coordinates of the circumscribed circle: U[0.75; 0.74990672467]
Coordinates of the inscribed circle: I[1.06; 0.43994527847]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 90.07113014329° = 90°4'17″ = 1.5769551882 rad
∠ B' = β' = 134.9644349284° = 134°57'52″ = 0.78660203858 rad
∠ C' = γ' = 134.9644349284° = 134°57'52″ = 0.78660203858 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    