# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 7   b = 19   c = 20

Area: T = 66.45329909033
Perimeter: p = 46
Semiperimeter: s = 23

Angle ∠ A = α = 20.47221827795° = 20°28'20″ = 0.35773069946 rad
Angle ∠ B = β = 71.68223015888° = 71°40'56″ = 1.25110921781 rad
Angle ∠ C = γ = 87.84655156316° = 87°50'44″ = 1.53331934809 rad

Height: ha = 18.98765688295
Height: hb = 6.9955051674
Height: hc = 6.64552990903

Median: ma = 19.19898410624
Median: mb = 11.58766302263
Median: mc = 10.2476950766

Inradius: r = 2.88992604741
Circumradius: R = 10.00770740378

Vertex coordinates: A[20; 0] B[0; 0] C[2.2; 6.64552990903]
Centroid: CG[7.4; 2.21550996968]
Coordinates of the circumscribed circle: U[10; 0.37662057909]
Coordinates of the inscribed circle: I[4; 2.88992604741]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 159.528781722° = 159°31'40″ = 0.35773069946 rad
∠ B' = β' = 108.3187698411° = 108°19'4″ = 1.25110921781 rad
∠ C' = γ' = 92.15444843684° = 92°9'16″ = 1.53331934809 rad

# How did we calculate this triangle?

### 1. The triangle circumference is the sum of the lengths of its three sides ### 2. Semiperimeter of the triangle ### 3. The triangle area using Heron's formula ### 4. Calculate the heights of the triangle from its area. ### 5. Calculation of the inner angles of the triangle using a Law of Cosines ### 6. Inradius ### 7. Circumradius ### 8. 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.