# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse scalene triangle.

Sides: a = 19   b = 20   c = 30

Area: T = 186.7955175259
Perimeter: p = 69
Semiperimeter: s = 34.5

Angle ∠ A = α = 38.51099535886° = 38°30'36″ = 0.67221254849 rad
Angle ∠ B = β = 40.95216307599° = 40°57'6″ = 0.71547407908 rad
Angle ∠ C = γ = 100.5388415652° = 100°32'18″ = 1.75547263779 rad

Height: ha = 19.66326500273
Height: hb = 18.68795175259
Height: hc = 12.45330116839

Median: ma = 23.65990363286
Median: mb = 23.03325856126
Median: mc = 12.47699639133

Inradius: r = 5.41443529061
Circumradius: R = 15.25773533875

Vertex coordinates: A[30; 0] B[0; 0] C[14.35; 12.45330116839]
Centroid: CG[14.78333333333; 4.15110038946]
Coordinates of the circumscribed circle: U[15; -2.79904896327]
Coordinates of the inscribed circle: I[14.5; 5.41443529061]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 141.4990046411° = 141°29'24″ = 0.67221254849 rad
∠ B' = β' = 139.048836924° = 139°2'54″ = 0.71547407908 rad
∠ C' = γ' = 79.46215843485° = 79°27'42″ = 1.75547263779 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.