Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 3.28   b = 0.71   c = 3.2

Area: T = 1.13659943747
Perimeter: p = 7.19
Semiperimeter: s = 3.595

Angle ∠ A = α = 90.18803105192° = 90°10'49″ = 1.5743943339 rad
Angle ∠ B = β = 12.50113338863° = 12°30'5″ = 0.21881894372 rad
Angle ∠ C = γ = 77.31883555944° = 77°19'6″ = 1.34994598774 rad

Height: ha = 0.69326794968
Height: hb = 3.21999841541
Height: hc = 0.71099964842

Median: ma = 1.63878186713
Median: mb = 3.22107413743
Median: mc = 1.75224982168

Inradius: r = 0.3165992872
Circumradius: R = 1.64400081211

Vertex coordinates: A[3.2; 0] B[0; 0] C[3.2022234375; 0.71099964842]
Centroid: CG[2.1344078125; 0.23766654947]
Coordinates of the circumscribed circle: U[1.6; 0.36600369941]
Coordinates of the inscribed circle: I[2.885; 0.3165992872]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 89.82196894808° = 89°49'11″ = 1.5743943339 rad
∠ B' = β' = 167.4998666114° = 167°29'55″ = 0.21881894372 rad
∠ C' = γ' = 102.6821644406° = 102°40'54″ = 1.34994598774 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     