Triangle calculator SSS - result

Obtuse scalene triangle.

Sides: a = 3.6   b = 2.7   c = 1.8

Area: T = 2.35328373828
Perimeter: p = 8.1
Semiperimeter: s = 4.05

Angle ∠ A = α = 104.4787512186° = 104°28'39″ = 1.82334765819 rad
Angle ∠ B = β = 46.56774634422° = 46°34'3″ = 0.81327555614 rad
Angle ∠ C = γ = 28.95550243719° = 28°57'18″ = 0.50553605103 rad

Height: ha = 1.30771318793
Height: hb = 1.74328425058
Height: hc = 2.61442637587

Median: ma = 1.42330249471
Median: mb = 2.50554939633
Median: mc = 3.05220484924

Vertex coordinates: A[1.8; 0] B[0; 0] C[2.475; 2.61442637587]
Centroid: CG[1.425; 0.87114212529]
Coordinates of the circumscribed circle: U[0.9; 1.62766530054]
Coordinates of the inscribed circle: I[1.35; 0.58109475019]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 75.52224878141° = 75°31'21″ = 1.82334765819 rad
∠ B' = β' = 133.4332536558° = 133°25'57″ = 0.81327555614 rad
∠ C' = γ' = 151.0454975628° = 151°2'42″ = 0.50553605103 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    