# Triangle calculator VC

Please enter the coordinates of the three vertices

### Obtuse scalene triangle.

Sides: a = 8.944427191   b = 15.23215462117   c = 11.66219037897

Area: T = 52
Perimeter: p = 35.83877219114
Semiperimeter: s = 17.91988609557

Angle ∠ A = α = 35.83876529543° = 35°50'16″ = 0.62554850402 rad
Angle ∠ B = β = 94.3998705355° = 94°23'55″ = 1.64875682181 rad
Angle ∠ C = γ = 49.76436416907° = 49°45'49″ = 0.86985393953 rad

Height: ha = 11.6287553483
Height: hb = 6.82879345087
Height: hc = 8.91879264274

Median: ma = 12.80662484749
Median: mb = 7.07110678119
Median: mc = 11.04553610172

Inradius: r = 2.90219701715
Circumradius: R = 7.6388271746

Vertex coordinates: A[5; 10] B[-1; 0] C[-9; 4]
Centroid: CG[-1.66766666667; 4.66766666667]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[-0.22332284747; 2.90219701715]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 144.1622347046° = 144°9'44″ = 0.62554850402 rad
∠ B' = β' = 85.6011294645° = 85°36'5″ = 1.64875682181 rad
∠ C' = γ' = 130.2366358309° = 130°14'11″ = 0.86985393953 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.