# 8 26 26 triangle

### Acute isosceles triangle.

Sides: a = 8   b = 26   c = 26

Area: T = 102.7621860629
Perimeter: p = 60
Semiperimeter: s = 30

Angle ∠ A = α = 17.76997661969° = 17°41'59″ = 0.3098919197 rad
Angle ∠ B = β = 81.15501169016° = 81°9' = 1.41663367283 rad
Angle ∠ C = γ = 81.15501169016° = 81°9' = 1.41663367283 rad

Height: ha = 25.69904651573
Height: hb = 7.90547585099
Height: hc = 7.90547585099

Median: ma = 25.69904651573
Median: mb = 14.17774468788
Median: mc = 14.17774468788

Inradius: r = 3.42553953543
Circumradius: R = 13.15766321563

Vertex coordinates: A[26; 0] B[0; 0] C[1.23107692308; 7.90547585099]
Centroid: CG[9.07769230769; 2.63549195033]
Coordinates of the circumscribed circle: U[13; 2.02440972548]
Coordinates of the inscribed circle: I[4; 3.42553953543]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 162.3300233803° = 162°18'1″ = 0.3098919197 rad
∠ B' = β' = 98.85498830984° = 98°51' = 1.41663367283 rad
∠ C' = γ' = 98.85498830984° = 98°51' = 1.41663367283 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.