# 14 16 25 triangle

### Obtuse scalene triangle.

Sides: a = 14   b = 16   c = 25

Area: T = 103.3122329855
Perimeter: p = 55
Semiperimeter: s = 27.5

Angle ∠ A = α = 31.10218950348° = 31°6'7″ = 0.5432830472 rad
Angle ∠ B = β = 36.18222872212° = 36°10'56″ = 0.63215000429 rad
Angle ∠ C = γ = 112.7165817744° = 112°42'57″ = 1.96772621387 rad

Height: ha = 14.7598904265
Height: hb = 12.91440412318
Height: hc = 8.26549863884

Median: ma = 19.78663589374
Median: mb = 18.6154510469
Median: mc = 8.35216465442

Inradius: r = 3.75768119947
Circumradius: R = 13.55111414946

Vertex coordinates: A[25; 0] B[0; 0] C[11.3; 8.26549863884]
Centroid: CG[12.1; 2.75549954628]
Coordinates of the circumscribed circle: U[12.5; -5.2332918479]
Coordinates of the inscribed circle: I[11.5; 3.75768119947]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 148.8988104965° = 148°53'53″ = 0.5432830472 rad
∠ B' = β' = 143.8187712779° = 143°49'4″ = 0.63215000429 rad
∠ C' = γ' = 67.2844182256° = 67°17'3″ = 1.96772621387 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.