# 6 18 22 triangle

### Obtuse scalene triangle.

Sides: a = 6   b = 18   c = 22

Area: T = 44.21553819389
Perimeter: p = 46
Semiperimeter: s = 23

Angle ∠ A = α = 12.90435205392° = 12°54'13″ = 0.22552089185 rad
Angle ∠ B = β = 42.06216646665° = 42°3'42″ = 0.73441145373 rad
Angle ∠ C = γ = 125.0354814794° = 125°2'5″ = 2.18222691978 rad

Height: ha = 14.73884606463
Height: hb = 4.91328202154
Height: hc = 4.02195801763

Median: ma = 19.87546069144
Median: mb = 13.37990881603
Median: mc = 7.68111457479

Inradius: r = 1.92224079104
Circumradius: R = 13.4344238809

Vertex coordinates: A[22; 0] B[0; 0] C[4.45545454545; 4.02195801763]
Centroid: CG[8.81881818182; 1.34398600588]
Coordinates of the circumscribed circle: U[11; -7.71222482052]
Coordinates of the inscribed circle: I[5; 1.92224079104]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 167.0966479461° = 167°5'47″ = 0.22552089185 rad
∠ B' = β' = 137.9388335334° = 137°56'18″ = 0.73441145373 rad
∠ C' = γ' = 54.96551852057° = 54°57'55″ = 2.18222691978 rad

# How did we calculate this triangle?

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. ### 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.