# 2 26 26 triangle

### Acute isosceles triangle.

Sides: a = 2   b = 26   c = 26

Area: T = 25.98107621135
Perimeter: p = 54
Semiperimeter: s = 27

Angle ∠ A = α = 4.40884550079° = 4°24'30″ = 0.07769420548 rad
Angle ∠ B = β = 87.7965772496° = 87°47'45″ = 1.53223252994 rad
Angle ∠ C = γ = 87.7965772496° = 87°47'45″ = 1.53223252994 rad

Height: ha = 25.98107621135
Height: hb = 1.99985201626
Height: hc = 1.99985201626

Median: ma = 25.98107621135
Median: mb = 13.07766968306
Median: mc = 13.07766968306

Inradius: r = 0.96222504486
Circumradius: R = 13.01096260657

Vertex coordinates: A[26; 0] B[0; 0] C[0.07769230769; 1.99985201626]
Centroid: CG[8.69223076923; 0.66661733875]
Coordinates of the circumscribed circle: U[13; 0.55003702333]
Coordinates of the inscribed circle: I[1; 0.96222504486]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 175.5921544992° = 175°35'30″ = 0.07769420548 rad
∠ B' = β' = 92.2044227504° = 92°12'15″ = 1.53223252994 rad
∠ C' = γ' = 92.2044227504° = 92°12'15″ = 1.53223252994 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.