# 3 25 26 triangle

### Obtuse scalene triangle.

Sides: a = 3   b = 25   c = 26

Area: T = 36
Perimeter: p = 54
Semiperimeter: s = 27

Angle ∠ A = α = 6.36596602397° = 6°21'35″ = 0.11109970105 rad
Angle ∠ B = β = 67.3880135052° = 67°22'49″ = 1.17660052071 rad
Angle ∠ C = γ = 106.2660204708° = 106°15'37″ = 1.8554590436 rad

Height: ha = 24
Height: hb = 2.88
Height: hc = 2.76992307692

Median: ma = 25.46107541129
Median: mb = 13.6477344064
Median: mc = 12.16655250606

Inradius: r = 1.33333333333
Circumradius: R = 13.54216666667

Vertex coordinates: A[26; 0] B[0; 0] C[1.15438461538; 2.76992307692]
Centroid: CG[9.05112820513; 0.92330769231]
Coordinates of the circumscribed circle: U[13; -3.79216666667]
Coordinates of the inscribed circle: I[2; 1.33333333333]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 173.644033976° = 173°38'25″ = 0.11109970105 rad
∠ B' = β' = 112.6219864948° = 112°37'11″ = 1.17660052071 rad
∠ C' = γ' = 73.74397952917° = 73°44'23″ = 1.8554590436 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.