# 14 15 25 triangle

### Obtuse scalene triangle.

Sides: a = 14   b = 15   c = 25

Area: T = 91.78223512447
Perimeter: p = 54
Semiperimeter: s = 27

Angle ∠ A = α = 29.30881092355° = 29°18'29″ = 0.51215230037 rad
Angle ∠ B = β = 31.63326096964° = 31°37'57″ = 0.55220931902 rad
Angle ∠ C = γ = 119.0599281068° = 119°3'33″ = 2.07879764597 rad

Height: ha = 13.11217644635
Height: hb = 12.23876468326
Height: hc = 7.34325880996

Median: ma = 19.39107194297
Median: mb = 18.82215302247
Median: mc = 7.36554599313

Inradius: r = 3.39993463424
Circumradius: R = 14.33001348538

Vertex coordinates: A[25; 0] B[0; 0] C[11.92; 7.34325880996]
Centroid: CG[12.30766666667; 2.44875293665]
Coordinates of the circumscribed circle: U[12.5; -6.94657797861]
Coordinates of the inscribed circle: I[12; 3.39993463424]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 150.6921890764° = 150°41'31″ = 0.51215230037 rad
∠ B' = β' = 148.3677390304° = 148°22'3″ = 0.55220931902 rad
∠ C' = γ' = 60.9410718932° = 60°56'27″ = 2.07879764597 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.