Triangle calculator SSS - result

Please enter the triangle sides:

Obtuse scalene triangle.

Sides: a = 107   b = 77   c = 36.12

Area: T = 907.3332809081
Perimeter: p = 220.12
Semiperimeter: s = 110.06

Angle ∠ A = α = 139.2722183863° = 139°16'20″ = 2.43107581649 rad
Angle ∠ B = β = 28.0043914599° = 28°14″ = 0.48987605132 rad
Angle ∠ C = γ = 12.72439015379° = 12°43'26″ = 0.22220739755 rad

Height: ha = 16.95994917585
Height: hb = 23.56770859502
Height: hc = 50.24399119093

Median: ma = 27.47695686169
Median: mb = 69.96112549916
Median: mc = 91.4498545095

Inradius: r = 8.24439833644
Circumradius: R = 81.99765609701

Vertex coordinates: A[36.12; 0] B[0; 0] C[94.47219601329; 50.24399119093]
Centroid: CG[43.53106533776; 16.74766373031]
Coordinates of the circumscribed circle: U[18.06; 79.98329507515]
Coordinates of the inscribed circle: I[33.06; 8.24439833644]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 40.72878161369° = 40°43'40″ = 2.43107581649 rad
∠ B' = β' = 151.9966085401° = 151°59'46″ = 0.48987605132 rad
∠ C' = γ' = 167.2766098462° = 167°16'34″ = 0.22220739755 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     