# 14 26 26 triangle

### Acute isosceles triangle.

Sides: a = 14   b = 26   c = 26

Area: T = 175.2879776358
Perimeter: p = 66
Semiperimeter: s = 33

Angle ∠ A = α = 31.23769965513° = 31°14'13″ = 0.54551884383 rad
Angle ∠ B = β = 74.38215017244° = 74°22'53″ = 1.29882021077 rad
Angle ∠ C = γ = 74.38215017244° = 74°22'53″ = 1.29882021077 rad

Height: ha = 25.04399680511
Height: hb = 13.48330597198
Height: hc = 13.48330597198

Median: ma = 25.04399680511
Median: mb = 16.34401346384
Median: mc = 16.34401346384

Inradius: r = 5.31215083745
Circumradius: R = 13.49884197787

Vertex coordinates: A[26; 0] B[0; 0] C[3.76992307692; 13.48330597198]
Centroid: CG[9.92330769231; 4.49443532399]
Coordinates of the circumscribed circle: U[13; 3.63441899404]
Coordinates of the inscribed circle: I[7; 5.31215083745]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 148.7633003449° = 148°45'47″ = 0.54551884383 rad
∠ B' = β' = 105.6188498276° = 105°37'7″ = 1.29882021077 rad
∠ C' = γ' = 105.6188498276° = 105°37'7″ = 1.29882021077 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.