# 11 22 25 triangle

### Obtuse scalene triangle.

Sides: a = 11   b = 22   c = 25

Area: T = 120.8976650078
Perimeter: p = 58
Semiperimeter: s = 29

Angle ∠ A = α = 26.08799049389° = 26°4'48″ = 0.45551802098 rad
Angle ∠ B = β = 61.5521826557° = 61°33'7″ = 1.0744282034 rad
Angle ∠ C = γ = 92.36882685041° = 92°22'6″ = 1.61221304098 rad

Height: ha = 21.9811209105
Height: hb = 10.99106045525
Height: hc = 9.67217320062

Median: ma = 22.89765062837
Median: mb = 15.87545078664
Median: mc = 12.09333866224

Inradius: r = 4.16988500027
Circumradius: R = 12.51106857719

Vertex coordinates: A[25; 0] B[0; 0] C[5.24; 9.67217320062]
Centroid: CG[10.08; 3.22439106687]
Coordinates of the circumscribed circle: U[12.5; -0.51769704864]
Coordinates of the inscribed circle: I[7; 4.16988500027]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 153.9220095061° = 153°55'12″ = 0.45551802098 rad
∠ B' = β' = 118.4488173443° = 118°26'53″ = 1.0744282034 rad
∠ C' = γ' = 87.63217314959° = 87°37'54″ = 1.61221304098 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.