# 5 14 15 triangle

### Obtuse scalene triangle.

Sides: a = 5   b = 14   c = 15

Area: T = 34.98657113691
Perimeter: p = 34
Semiperimeter: s = 17

Angle ∠ A = α = 19.46329509463° = 19°27'47″ = 0.34396925762 rad
Angle ∠ B = β = 68.98998039759° = 68°53'59″ = 1.20325284334 rad
Angle ∠ C = γ = 91.63772450778° = 91°38'14″ = 1.59993716441 rad

Height: ha = 13.99442845476
Height: hb = 4.9987958767
Height: hc = 4.66547615159

Median: ma = 14.2921605928
Median: mb = 8.71877978871
Median: mc = 7.36554599313

Inradius: r = 2.05879830217
Circumradius: R = 7.50330631

Vertex coordinates: A[15; 0] B[0; 0] C[1.8; 4.66547615159]
Centroid: CG[5.6; 1.55549205053]
Coordinates of the circumscribed circle: U[7.5; -0.21443732314]
Coordinates of the inscribed circle: I[3; 2.05879830217]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 160.5377049054° = 160°32'13″ = 0.34396925762 rad
∠ B' = β' = 111.1100196024° = 111°6'1″ = 1.20325284334 rad
∠ C' = γ' = 88.36327549222° = 88°21'46″ = 1.59993716441 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.