# 12 14 25 triangle

### Obtuse scalene triangle.

Sides: a = 12   b = 14   c = 25

Area: T = 44.49108698499
Perimeter: p = 51
Semiperimeter: s = 25.5

Angle ∠ A = α = 14.7288173671° = 14°43'41″ = 0.25770551234 rad
Angle ∠ B = β = 17.25438531174° = 17°15'14″ = 0.30111365456 rad
Angle ∠ C = γ = 148.0187973212° = 148°1'5″ = 2.58334009847 rad

Height: ha = 7.4155144975
Height: hb = 6.356583855
Height: hc = 3.5599269588

Median: ma = 19.35220024804
Median: mb = 18.3176659084
Median: mc = 3.70880992435

Inradius: r = 1.74547399941
Circumradius: R = 23.66003477465

Vertex coordinates: A[25; 0] B[0; 0] C[11.46; 3.5599269588]
Centroid: CG[12.15333333333; 1.1866423196]
Coordinates of the circumscribed circle: U[12.5; -20.01881521064]
Coordinates of the inscribed circle: I[11.5; 1.74547399941]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 165.2721826329° = 165°16'19″ = 0.25770551234 rad
∠ B' = β' = 162.7466146883° = 162°44'46″ = 0.30111365456 rad
∠ C' = γ' = 31.98220267884° = 31°58'55″ = 2.58334009847 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.