# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute scalene triangle.

Sides: a = 20   b = 27   c = 30

Area: T = 263.8610640301
Perimeter: p = 77
Semiperimeter: s = 38.5

Angle ∠ A = α = 40.65553767418° = 40°39'19″ = 0.71095701828 rad
Angle ∠ B = β = 61.58663778464° = 61°35'11″ = 1.07548850678 rad
Angle ∠ C = γ = 77.75882454118° = 77°45'30″ = 1.3577137403 rad

Height: ha = 26.38660640301
Height: hb = 19.54552326149
Height: hc = 17.59107093534

Median: ma = 26.73301328092
Median: mb = 21.62875287539
Median: mc = 18.42655257727

Inradius: r = 6.85435231247
Circumradius: R = 15.3499011491

Vertex coordinates: A[30; 0] B[0; 0] C[9.51766666667; 17.59107093534]
Centroid: CG[13.17222222222; 5.86435697845]
Coordinates of the circumscribed circle: U[15; 3.2554558918]
Coordinates of the inscribed circle: I[11.5; 6.85435231247]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 139.3454623258° = 139°20'41″ = 0.71095701828 rad
∠ B' = β' = 118.4143622154° = 118°24'49″ = 1.07548850678 rad
∠ C' = γ' = 102.2421754588° = 102°14'30″ = 1.3577137403 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.