# Triangle calculator VC

Please enter the coordinates of the three vertices

### Obtuse scalene triangle.

Sides: a = 8.6022325267   b = 2.82884271247   c = 5.83109518948

Area: T = 2
Perimeter: p = 17.26217042866
Semiperimeter: s = 8.63108521433

Angle ∠ A = α = 165.9643756532° = 165°57'50″ = 2.89766139905 rad
Angle ∠ B = β = 4.57439212599° = 4°34'26″ = 0.08798299857 rad
Angle ∠ C = γ = 9.4622322208° = 9°27'44″ = 0.16551486774 rad

Height: ha = 0.4654990555
Height: hb = 1.41442135624
Height: hc = 0.68659943406

Median: ma = 1.58111388301
Median: mb = 7.21111025509
Median: mc = 5.70108771255

Inradius: r = 0.23217268291
Circumradius: R = 17.7344147851

Vertex coordinates: A[-4; 1] B[1; 4] C[-6; -1]
Centroid: CG[-3; 1.33333333333]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[2.89765853643; 0.23217268291]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 14.03662434679° = 14°2'10″ = 2.89766139905 rad
∠ B' = β' = 175.426607874° = 175°25'34″ = 0.08798299857 rad
∠ C' = γ' = 170.5387677792° = 170°32'16″ = 0.16551486774 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.