# Triangle calculator VC

Please enter the coordinates of the three vertices

### Right scalene triangle.

Sides: a = 12.64991106407   b = 11.3143708499   c = 5.65768542495

Area: T = 32
Perimeter: p = 29.62196733892
Semiperimeter: s = 14.81098366946

Angle ∠ A = α = 90° = 1.57107963268 rad
Angle ∠ B = β = 63.43549488229° = 63°26'6″ = 1.10771487178 rad
Angle ∠ C = γ = 26.56550511771° = 26°33'54″ = 0.4643647609 rad

Height: ha = 5.06596442563
Height: hb = 5.65768542495
Height: hc = 11.3143708499

Median: ma = 6.32545553203
Median: mb = 8
Median: mc = 11.66219037897

Inradius: r = 2.16107260539
Circumradius: R = 6.32545553203

Vertex coordinates: A[-4; 5] B[-8; 1] C[4; -3]
Centroid: CG[-2.66766666667; 1]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[1.0880363027; 2.16107260539]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 90° = 1.57107963268 rad
∠ B' = β' = 116.5655051177° = 116°33'54″ = 1.10771487178 rad
∠ C' = γ' = 153.4354948823° = 153°26'6″ = 0.4643647609 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.