Triangle calculator SSS - result

Please enter the triangle sides:

Right scalene triangle.

Sides: a = 77   b = 36   c = 85

Area: T = 1386
Perimeter: p = 198
Semiperimeter: s = 99

Angle ∠ A = α = 64.94223845817° = 64°56'33″ = 1.1333458435 rad
Angle ∠ B = β = 25.05876154183° = 25°3'27″ = 0.43773378917 rad
Angle ∠ C = γ = 90° = 1.57107963268 rad

Height: ha = 36
Height: hb = 77
Height: hc = 32.61217647059

Median: ma = 52.70991073724
Median: mb = 79.07659128939
Median: mc = 42.5

Inradius: r = 14
Circumradius: R = 42.5

Vertex coordinates: A[85; 0] B[0; 0] C[69.75329411765; 32.61217647059]
Centroid: CG[51.58443137255; 10.87105882353]
Coordinates of the circumscribed circle: U[42.5; 0]
Coordinates of the inscribed circle: I[63; 14]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 115.0587615418° = 115°3'27″ = 1.1333458435 rad
∠ B' = β' = 154.9422384582° = 154°56'33″ = 0.43773378917 rad
∠ C' = γ' = 90° = 1.57107963268 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     