# Triangle calculator VC

Please enter the coordinates of the three vertices

### Obtuse scalene triangle.

Sides: a = 14.14221356237   b = 9.84988578018   c = 5.38551648071

Area: T = 19
Perimeter: p = 29.37661582327
Semiperimeter: s = 14.68880791163

Angle ∠ A = α = 134.2366101539° = 134°14'10″ = 2.34328619469 rad
Angle ∠ B = β = 29.93215118405° = 29°55'53″ = 0.52224034317 rad
Angle ∠ C = γ = 15.83223866204° = 15°49'57″ = 0.2766327275 rad

Height: ha = 2.68770057685
Height: hb = 3.85883154275
Height: hc = 7.05664228507

Median: ma = 3.60655512755
Median: mb = 9.5
Median: mc = 11.8854864324

Inradius: r = 1.2943566017
Circumradius: R = 9.86992982066

Vertex coordinates: A[1; -6] B[6; -4] C[-8; -2]
Centroid: CG[-0.33333333333; -4]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[2.24767199243; 1.2943566017]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 45.76438984609° = 45°45'50″ = 2.34328619469 rad
∠ B' = β' = 150.0688488159° = 150°4'7″ = 0.52224034317 rad
∠ C' = γ' = 164.168761338° = 164°10'3″ = 0.2766327275 rad

# How did we calculate this triangle?

### 1. We compute side a from coordinates using the Pythagorean theorem ### 2. We compute side b from coordinates using the Pythagorean theorem ### 3. We compute side c from coordinates using the Pythagorean theorem 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. ### 4. The triangle circumference is the sum of the lengths of its three sides ### 5. Semiperimeter of the triangle ### 6. The triangle area using Heron's formula ### 7. Calculate the heights of the triangle from its area. ### 8. Calculation of the inner angles of the triangle using a Law of Cosines ### 9. Inradius ### 10. Circumradius ### 11. Calculation of medians #### Look also our friend's collection of math examples and problems:

See more informations about triangles or more information about solving triangles.