Triangle calculator SSA

Please enter two sides and a non-included angle
°

Obtuse scalene triangle.

Sides: a = 3.5   b = 4.2   c = 0.77000888548

Area: T = 0.02113819117
Perimeter: p = 8.44000888548
Semiperimeter: s = 4.22000444274

Angle ∠ A = α = 0.83333204049° = 0°50' = 0.01545441848 rad
Angle ∠ B = β = 179° = 3.12441393611 rad
Angle ∠ C = γ = 0.16766795951° = 0°10' = 0.00329091077 rad

Height: ha = 0.01222182352
Height: hb = 0.01101818627
Height: hc = 0.06110834225

Median: ma = 2.45500126943
Median: mb = 1.44000222149
Median: mc = 3.85499959609

Vertex coordinates: A[0.77000888548; 0] B[0; 0] C[-3.4999466933; 0.06110834225]
Centroid: CG[-0.93331260261; 0.02203611408]
Coordinates of the circumscribed circle: U[0.35500444274; 120.3276736688]
Coordinates of the inscribed circle: I[04.44274E-5; 0.00550908775]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 179.1676679595° = 179°10' = 0.01545441848 rad
∠ B' = β' = 1° = 3.12441393611 rad
∠ C' = γ' = 179.8333320405° = 179°50' = 0.00329091077 rad

How did we calculate this triangle?

1. Use Law of Cosines Now we know the lengths of all three sides of the triangle and the triangle is uniquely determined. Next we calculate another its characteristics - same procedure as calculation of the triangle from the known three sides SSS. 2. The triangle circumference is the sum of the lengths of its three sides 3. Semiperimeter of the triangle 4. The triangle area using Heron's formula 5. Calculate the heights of the triangle from its area. 6. Calculation of the inner angles of the triangle using a Law of Cosines    