# 9 22 26 triangle

### Obtuse scalene triangle.

Sides: a = 9   b = 22   c = 26

Area: T = 95.03112448619
Perimeter: p = 57
Semiperimeter: s = 28.5

Angle ∠ A = α = 19.40770433824° = 19°24'25″ = 0.33987168051 rad
Angle ∠ B = β = 54.31546652873° = 54°18'53″ = 0.94879697414 rad
Angle ∠ C = γ = 106.278829133° = 106°16'42″ = 1.85549061071 rad

Height: ha = 21.11880544138
Height: hb = 8.63992040784
Height: hc = 7.31100957586

Median: ma = 23.65990363286
Median: mb = 16.04768065359
Median: mc = 10.65436378763

Inradius: r = 3.33444296443
Circumradius: R = 13.54329142475

Vertex coordinates: A[26; 0] B[0; 0] C[5.25; 7.31100957586]
Centroid: CG[10.41766666667; 2.43766985862]
Coordinates of the circumscribed circle: U[13; -3.79661199027]
Coordinates of the inscribed circle: I[6.5; 3.33444296443]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 160.5932956618° = 160°35'35″ = 0.33987168051 rad
∠ B' = β' = 125.6855334713° = 125°41'7″ = 0.94879697414 rad
∠ C' = γ' = 73.72217086698° = 73°43'18″ = 1.85549061071 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.