# Triangle calculator VC

Please enter the coordinates of the three vertices

### Right scalene triangle.

Sides: a = 20.16   b = 2.7   c = 20.34

Area: T = 27.216
Perimeter: p = 43.2
Semiperimeter: s = 21.6

Angle ∠ A = α = 82.37218503314° = 82°22'19″ = 1.43876599992 rad
Angle ∠ B = β = 7.62881496686° = 7°37'41″ = 0.13331363276 rad
Angle ∠ C = γ = 90° = 1.57107963268 rad

Height: ha = 2.7
Height: hb = 20.16
Height: hc = 2.67661061947

Median: ma = 10.43553437893
Median: mb = 20.20551503335
Median: mc = 10.17

Inradius: r = 1.26
Circumradius: R = 10.17

Vertex coordinates: A[20.16; 0] B[0; 2.7] C[20.16; 2.7]
Centroid: CG[13.44; 1.8]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[9.408; 1.26]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 97.62881496686° = 97°37'41″ = 1.43876599992 rad
∠ B' = β' = 172.3721850331° = 172°22'19″ = 0.13331363276 rad
∠ C' = γ' = 90° = 1.57107963268 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.