# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 6   b = 28   c = 28

Area: T = 83.51664654425
Perimeter: p = 62
Semiperimeter: s = 31

Angle ∠ A = α = 12.30112796559° = 12°18'5″ = 0.21546978322 rad
Angle ∠ B = β = 83.84993601721° = 83°50'58″ = 1.46334474107 rad
Angle ∠ C = γ = 83.84993601721° = 83°50'58″ = 1.46334474107 rad

Height: ha = 27.83988218142
Height: hb = 5.96554618173
Height: hc = 5.96554618173

Median: ma = 27.83988218142
Median: mb = 14.62987388383
Median: mc = 14.62987388383

Inradius: r = 2.69440795304
Circumradius: R = 14.08110556789

Vertex coordinates: A[28; 0] B[0; 0] C[0.64328571429; 5.96554618173]
Centroid: CG[9.54876190476; 1.98884872724]
Coordinates of the circumscribed circle: U[14; 1.5098684537]
Coordinates of the inscribed circle: I[3; 2.69440795304]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 167.6998720344° = 167°41'55″ = 0.21546978322 rad
∠ B' = β' = 96.15106398279° = 96°9'2″ = 1.46334474107 rad
∠ C' = γ' = 96.15106398279° = 96°9'2″ = 1.46334474107 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    