Triangle calculator SSS - result

Please enter the triangle sides:

Acute scalene triangle.

Sides: a = 39   b = 18.19   c = 43.03

Area: T = 354.7054992323
Perimeter: p = 100.22
Semiperimeter: s = 50.11

Angle ∠ A = α = 65.00549630185° = 65°18″ = 1.13545506348 rad
Angle ∠ B = β = 25.0076957954° = 25°25″ = 0.43664537522 rad
Angle ∠ C = γ = 89.98880790275° = 89°59'17″ = 1.57105882666 rad

Height: ha = 18.19899996063
Height: hb = 398.9999991559
Height: hc = 16.4866404477

Median: ma = 26.66441800924
Median: mb = 40.0454617928
Median: mc = 21.51884298916

Inradius: r = 7.07985270869
Circumradius: R = 21.51550004657

Vertex coordinates: A[43.03; 0] B[0; 0] C[35.34440018592; 16.4866404477]
Centroid: CG[26.12546672864; 5.4955468159]
Coordinates of the circumscribed circle: U[21.515; 0.00444764157]
Coordinates of the inscribed circle: I[31.92; 7.07985270869]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 114.9955036981° = 114°59'42″ = 1.13545506348 rad
∠ B' = β' = 154.9933042046° = 154°59'35″ = 0.43664537522 rad
∠ C' = γ' = 90.01219209725° = 90°43″ = 1.57105882666 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     