# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 16.23   b = 17.99   c = 9.3

Area: T = 75.18333559623
Perimeter: p = 43.52
Semiperimeter: s = 21.76

Angle ∠ A = α = 63.9943888827° = 63°59'38″ = 1.11769040612 rad
Angle ∠ B = β = 85.00990690717° = 85°33″ = 1.48436881494 rad
Angle ∠ C = γ = 30.99770421013° = 30°59'49″ = 0.5411000443 rad

Height: ha = 9.2654738874
Height: hb = 8.35883497457
Height: hc = 16.16884636478

Median: ma = 11.79988060837
Median: mb = 9.69774958108
Median: mc = 16.49895118181

Inradius: r = 3.45551174615
Circumradius: R = 9.02992345136

Vertex coordinates: A[9.3; 0] B[0; 0] C[1.41219784946; 16.16884636478]
Centroid: CG[3.57106594982; 5.38994878826]
Coordinates of the circumscribed circle: U[4.65; 7.74398046423]
Coordinates of the inscribed circle: I[3.77; 3.45551174615]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 116.0066111173° = 116°22″ = 1.11769040612 rad
∠ B' = β' = 94.99109309283° = 94°59'27″ = 1.48436881494 rad
∠ C' = γ' = 149.0032957899° = 149°11″ = 0.5411000443 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    