Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 18.7   b = 27.33   c = 16.1

Area: T = 146.5276576592
Perimeter: p = 62.13
Semiperimeter: s = 31.065

Angle ∠ A = α = 41.76598731554° = 41°45'36″ = 0.72988472818 rad
Angle ∠ B = β = 103.2521776878° = 103°15'6″ = 1.80220834651 rad
Angle ∠ C = γ = 34.98883499669° = 34°59'18″ = 0.61106619068 rad

Height: ha = 15.67112916141
Height: hb = 10.7232764478
Height: hc = 18.2022059204

Median: ma = 20.38774213671
Median: mb = 10.85497822559
Median: mc = 21.98987914629

Inradius: r = 4.71767737516
Circumradius: R = 14.03988236922

Vertex coordinates: A[16.1; 0] B[0; 0] C[-4.28766118012; 18.2022059204]
Centroid: CG[3.93877960663; 6.0677353068]
Coordinates of the circumscribed circle: U[8.05; 11.50215681827]
Coordinates of the inscribed circle: I[3.735; 4.71767737516]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 138.2440126845° = 138°14'24″ = 0.72988472818 rad
∠ B' = β' = 76.74882231223° = 76°44'54″ = 1.80220834651 rad
∠ C' = γ' = 145.0121650033° = 145°42″ = 0.61106619068 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     