# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 3.61   b = 4.47   c = 4.12

Area: T = 7.00114983111
Perimeter: p = 12.2
Semiperimeter: s = 6.1

Angle ∠ A = α = 49.49554789986° = 49°29'44″ = 0.86438590734 rad
Angle ∠ B = β = 70.30436219861° = 70°18'13″ = 1.22770296797 rad
Angle ∠ C = γ = 60.20108990153° = 60°12'3″ = 1.05107039005 rad

Height: ha = 3.87989464327
Height: hb = 3.13326614367
Height: hc = 3.39987855879

Median: ma = 3.90112337792
Median: mb = 3.16435462696
Median: mc = 3.50218423722

Inradius: r = 1.14877866084
Circumradius: R = 2.37438920245

Vertex coordinates: A[4.12; 0] B[0; 0] C[1.21766990291; 3.39987855879]
Centroid: CG[1.77988996764; 1.13329285293]
Coordinates of the circumscribed circle: U[2.06; 1.18797301996]
Coordinates of the inscribed circle: I[1.63; 1.14877866084]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 130.5054521001° = 130°30'16″ = 0.86438590734 rad
∠ B' = β' = 109.6966378014° = 109°41'47″ = 1.22770296797 rad
∠ C' = γ' = 119.7999100985° = 119°47'57″ = 1.05107039005 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    