Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 22.24   b = 18.8   c = 3.87

Area: T = 18.10992612072
Perimeter: p = 44.91
Semiperimeter: s = 22.455

Angle ∠ A = α = 150.1454912661° = 150°8'42″ = 2.62105230811 rad
Angle ∠ B = β = 24.88656711975° = 24°53'8″ = 0.4344336899 rad
Angle ∠ C = γ = 4.96994161417° = 4°58'10″ = 0.08767326736 rad

Height: ha = 1.62985306841
Height: hb = 1.92765171497
Height: hc = 9.35987913215

Median: ma = 7.7821648283
Median: mb = 12.90110561583
Median: mc = 20.50108432753

Inradius: r = 0.80664689916
Circumradius: R = 22.33879272833

Vertex coordinates: A[3.87; 0] B[0; 0] C[20.175; 9.35987913215]
Centroid: CG[8.015; 3.12195971072]
Coordinates of the circumscribed circle: U[1.935; 22.25439607781]
Coordinates of the inscribed circle: I[3.655; 0.80664689916]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 29.85550873391° = 29°51'18″ = 2.62105230811 rad
∠ B' = β' = 155.1144328803° = 155°6'52″ = 0.4344336899 rad
∠ C' = γ' = 175.0310583858° = 175°1'50″ = 0.08767326736 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     