9 13 14 triangle
Acute scalene triangle.
Sides: a = 9 b = 13 c = 14Area: T = 56.9210997883
Perimeter: p = 36
Semiperimeter: s = 18
Angle ∠ A = α = 38.71992973222° = 38°43'9″ = 0.67657792223 rad
Angle ∠ B = β = 64.62330664748° = 64°37'23″ = 1.12878852827 rad
Angle ∠ C = γ = 76.65876362029° = 76°39'28″ = 1.33879281485 rad
Height: ha = 12.64991106407
Height: hb = 8.75770765974
Height: hc = 8.13215711261
Median: ma = 12.73877392029
Median: mb = 9.81107084352
Median: mc = 8.71877978871
Inradius: r = 3.16222776602
Circumradius: R = 7.19441816769
Vertex coordinates: A[14; 0] B[0; 0] C[3.85771428571; 8.13215711261]
Centroid: CG[5.95223809524; 2.71105237087]
Coordinates of the circumscribed circle: U[7; 1.66601957716]
Coordinates of the inscribed circle: I[5; 3.16222776602]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 141.2810702678° = 141°16'51″ = 0.67657792223 rad
∠ B' = β' = 115.3776933525° = 115°22'37″ = 1.12878852827 rad
∠ C' = γ' = 103.3422363797° = 103°20'32″ = 1.33879281485 rad
Calculate another triangle
How did we calculate this triangle?
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.
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

6. Inradius

7. Circumradius
