# 6 23 26 triangle

### Obtuse scalene triangle.

Sides: a = 6   b = 23   c = 26

Area: T = 63.17438672237
Perimeter: p = 55
Semiperimeter: s = 27.5

Angle ∠ A = α = 12.19875989742° = 12°11'51″ = 0.21328882629 rad
Angle ∠ B = β = 54.08882502205° = 54°5'18″ = 0.9444018053 rad
Angle ∠ C = γ = 113.7144150805° = 113°42'51″ = 1.98546863377 rad

Height: ha = 21.05879557412
Height: hb = 5.49333797586
Height: hc = 4.8659528248

Median: ma = 24.36218554302
Median: mb = 14.95882753017
Median: mc = 10.65436378763

Inradius: r = 2.29772315354
Circumradius: R = 14.19989091284

Vertex coordinates: A[26; 0] B[0; 0] C[3.51992307692; 4.8659528248]
Centroid: CG[9.84397435897; 1.62198427493]
Coordinates of the circumscribed circle: U[13; -5.71104308451]
Coordinates of the inscribed circle: I[4.5; 2.29772315354]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 167.8022401026° = 167°48'9″ = 0.21328882629 rad
∠ B' = β' = 125.912174978° = 125°54'42″ = 0.9444018053 rad
∠ C' = γ' = 66.28658491947° = 66°17'9″ = 1.98546863377 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.