# Triangle calculator

Please enter what you know about the triangle:
You have entered side a, b and angle γ.

### Obtuse scalene triangle.

Sides: a = 0.03   b = 0.33   c = 0.34114264179

Area: T = 0.00546514785
Perimeter: p = 0.70114264179
Semiperimeter: s = 0.35107132089

Angle ∠ A = α = 4.73661699856° = 4°44'10″ = 0.08326617602 rad
Angle ∠ B = β = 65.26438300144° = 65°15'50″ = 1.13990687162 rad
Angle ∠ C = γ = 110° = 1.92198621772 rad

Height: ha = 0.31100985649
Height: hb = 0.02881907786
Height: hc = 0.02772473261

Median: ma = 0.33554265932
Median: mb = 0.17875133781
Median: mc = 0.1660489876

Inradius: r = 0.01332629121
Circumradius: R = 0.18216692024

Vertex coordinates: A[0.34114264179; 0] B[0; 0] C[0.01325532156; 0.02772473261]
Centroid: CG[0.11879932111; 0.0099082442]
Coordinates of the circumscribed circle: U[0.17107132089; -0.06221345267]
Coordinates of the inscribed circle: I[0.02107132089; 0.01332629121]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 175.2643830014° = 175°15'50″ = 0.08326617602 rad
∠ B' = β' = 114.7366169986° = 114°44'10″ = 1.13990687162 rad
∠ C' = γ' = 70° = 1.92198621772 rad

# How did we calculate this triangle?

### 1. Input data entered: side a, b and angle γ. ### 2. Calculation of the third side c of the triangle using a 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. ### 3. The triangle circumference is the sum of the lengths of its three sides ### 4. Semiperimeter of the triangle ### 5. The triangle area using Heron's formula ### 6. Calculate the heights of the triangle from its area. ### 7. Calculation of the inner angles of the triangle using a Law of Cosines    