# Triangle calculator VC

Please enter the coordinates of the three vertices

### Obtuse scalene triangle.

Sides: a = 2.82884271247   b = 5.09990195136   c = 3.16222776602

Area: T = 4
Perimeter: p = 11.09897242985
Semiperimeter: s = 5.54548621493

Angle ∠ A = α = 29.74548812969° = 29°44'42″ = 0.51991461142 rad
Angle ∠ B = β = 116.5655051177° = 116°33'54″ = 2.03444439358 rad
Angle ∠ C = γ = 33.6990067526° = 33°41'24″ = 0.58880026035 rad

Height: ha = 2.82884271247
Height: hb = 1.56989290811
Height: hc = 2.53298221281

Median: ma = 4
Median: mb = 1.58111388301
Median: mc = 3.80878865529

Inradius: r = 0.72113885381
Circumradius: R = 2.85504385627

Vertex coordinates: A[1; 0] B[0; 3] C[2; 5]
Centroid: CG[1; 2.66766666667]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[-0.36106942691; 0.72113885381]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 150.2555118703° = 150°15'18″ = 0.51991461142 rad
∠ B' = β' = 63.43549488229° = 63°26'6″ = 2.03444439358 rad
∠ C' = γ' = 146.3109932474° = 146°18'36″ = 0.58880026035 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.