# Triangle calculator VC

Please enter the coordinates of the three vertices

### Obtuse scalene triangle.

Sides: a = 9.22195444573   b = 4.12331056256   c = 5.09990195136

Area: T = 0.5
Perimeter: p = 18.44216695965
Semiperimeter: s = 9.22108347983

Angle ∠ A = α = 177.2743689006° = 177°16'25″ = 3.09440095503 rad
Angle ∠ B = β = 1.21988752351° = 1°13'8″ = 0.0211273386 rad
Angle ∠ C = γ = 1.50774357588° = 1°30'27″ = 0.02663097173 rad

Height: ha = 0.10884652289
Height: hb = 0.2432535625
Height: hc = 0.19661161351

Median: ma = 0.5
Median: mb = 7.15989105316
Median: mc = 6.67108320321

Inradius: r = 0.05442250253
Circumradius: R = 96.91549111334

Vertex coordinates: A[5; -1] B[6; -6] C[4; 3]
Centroid: CG[5; -1.33333333333]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[2.5498576188; 0.05442250253]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 2.72663109939° = 2°43'35″ = 3.09440095503 rad
∠ B' = β' = 178.7811124765° = 178°46'52″ = 0.0211273386 rad
∠ C' = γ' = 178.4932564241° = 178°29'33″ = 0.02663097173 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.