# Triangle calculator VC

Please enter the coordinates of the three vertices

### Obtuse scalene triangle.

Sides: a = 4.12331056256   b = 2.23660679775   c = 5.83109518948

Area: T = 3.5
Perimeter: p = 12.1990125498
Semiperimeter: s = 6.0955062749

Angle ∠ A = α = 32.47111922908° = 32°28'16″ = 0.56767292175 rad
Angle ∠ B = β = 16.92875130641° = 16°55'39″ = 0.29554408371 rad
Angle ∠ C = γ = 130.6011294645° = 130°36'5″ = 2.27994225989 rad

Height: ha = 1.69877493753
Height: hb = 3.13304951685
Height: hc = 1.2200490096

Median: ma = 3.9055124838
Median: mb = 4.92444289009
Median: mc = 1.58111388301

Inradius: r = 0.57442352695
Circumradius: R = 3.84399085873

Vertex coordinates: A[-5; 10] B[0; 7] C[-4; 8]
Centroid: CG[-3; 8.33333333333]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[1.88767730282; 0.57442352695]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 147.5298807709° = 147°31'44″ = 0.56767292175 rad
∠ B' = β' = 163.0722486936° = 163°4'21″ = 0.29554408371 rad
∠ C' = γ' = 49.3998705355° = 49°23'55″ = 2.27994225989 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.