# Triangle calculator VC

Please enter the coordinates of the three vertices

### Obtuse scalene triangle.

Sides: a = 6.32545553203   b = 8.6022325267   c = 3.16222776602

Area: T = 8
Perimeter: p = 18.08991582475
Semiperimeter: s = 9.04545791238

Angle ∠ A = α = 36.02773733851° = 36°1'39″ = 0.62987962864 rad
Angle ∠ B = β = 126.8769897646° = 126°52'12″ = 2.21442974356 rad
Angle ∠ C = γ = 17.10327289691° = 17°6'10″ = 0.29884989316 rad

Height: ha = 2.53298221281
Height: hb = 1.86599622199
Height: hc = 5.06596442563

Median: ma = 5.65768542495
Median: mb = 2.55495097568
Median: mc = 7.38224115301

Inradius: r = 0.88545077135
Circumradius: R = 5.37664532919

Vertex coordinates: A[-4; -2] B[-3; -5] C[3; -7]
Centroid: CG[-1.33333333333; -4.66766666667]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[-0.66333807851; 0.88545077135]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 143.9732626615° = 143°58'21″ = 0.62987962864 rad
∠ B' = β' = 53.13301023542° = 53°7'48″ = 2.21442974356 rad
∠ C' = γ' = 162.8977271031° = 162°53'50″ = 0.29884989316 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.