# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 5.78   b = 3.9   c = 1.95

Area: T = 1.22773488499
Perimeter: p = 11.63
Semiperimeter: s = 5.815

Angle ∠ A = α = 161.1699220748° = 161°10'9″ = 2.81329335549 rad
Angle ∠ B = β = 12.57991923996° = 12°34'45″ = 0.22195483246 rad
Angle ∠ C = γ = 6.25215868521° = 6°15'6″ = 0.1099110774 rad

Height: ha = 0.42546881834
Height: hb = 0.62994096666
Height: hc = 1.25988193332

Median: ma = 1.07443137344
Median: mb = 3.84774602012
Median: mc = 4.83330709699

Inradius: r = 0.21110660103
Circumradius: R = 8.95436279769

Vertex coordinates: A[1.95; 0] B[0; 0] C[5.64112564103; 1.25988193332]
Centroid: CG[2.53304188034; 0.42196064444]
Coordinates of the circumscribed circle: U[0.975; 8.99003836406]
Coordinates of the inscribed circle: I[1.915; 0.21110660103]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 18.83107792517° = 18°49'51″ = 2.81329335549 rad
∠ B' = β' = 167.42108076° = 167°25'15″ = 0.22195483246 rad
∠ C' = γ' = 173.7488413148° = 173°44'54″ = 0.1099110774 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    