# 14 15 26 triangle

### Obtuse scalene triangle.

Sides: a = 14   b = 15   c = 26

Area: T = 83.43222329798
Perimeter: p = 55
Semiperimeter: s = 27.5

Angle ∠ A = α = 25.33216750167° = 25°19'54″ = 0.44221211341 rad
Angle ∠ B = β = 27.28551265654° = 27°17'6″ = 0.47662152954 rad
Angle ∠ C = γ = 127.3833198418° = 127°23' = 2.22332562241 rad

Height: ha = 11.91988904257
Height: hb = 11.12442977306
Height: hc = 6.41878640754

Median: ma = 20.03774649095
Median: mb = 19.48771752699
Median: mc = 6.44220493634

Inradius: r = 3.03438993811
Circumradius: R = 16.36105833291

Vertex coordinates: A[26; 0] B[0; 0] C[12.44223076923; 6.41878640754]
Centroid: CG[12.81441025641; 2.13992880251]
Coordinates of the circumscribed circle: U[13; -9.9333211307]
Coordinates of the inscribed circle: I[12.5; 3.03438993811]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 154.6688324983° = 154°40'6″ = 0.44221211341 rad
∠ B' = β' = 152.7154873435° = 152°42'54″ = 0.47662152954 rad
∠ C' = γ' = 52.61768015821° = 52°37' = 2.22332562241 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.