# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 9.9   b = 5.39   c = 9.22

Area: T = 24.52217653324
Perimeter: p = 24.51
Semiperimeter: s = 12.255

Angle ∠ A = α = 80.70767539998° = 80°42'24″ = 1.40985985859 rad
Angle ∠ B = β = 32.54999233514° = 32°30' = 0.56772306691 rad
Angle ∠ C = γ = 66.79333226488° = 66°47'36″ = 1.16657633986 rad

Height: ha = 4.95438919864
Height: hb = 9.09989852811
Height: hc = 5.31992549528

Median: ma = 5.70333104422
Median: mb = 9.1798571512
Median: mc = 6.50222265417

Inradius: r = 2.00109600434
Circumradius: R = 5.01658340288

Vertex coordinates: A[9.22; 0] B[0; 0] C[8.35495824295; 5.31992549528]
Centroid: CG[5.85765274765; 1.77330849843]
Coordinates of the circumscribed circle: U[4.61; 1.97664845064]
Coordinates of the inscribed circle: I[6.865; 2.00109600434]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 99.29332460002° = 99°17'36″ = 1.40985985859 rad
∠ B' = β' = 147.5500076649° = 147°30' = 0.56772306691 rad
∠ C' = γ' = 113.2076677351° = 113°12'24″ = 1.16657633986 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    