# 4 13 14 triangle

### Obtuse scalene triangle.

Sides: a = 4   b = 13   c = 14

Area: T = 25.85441582729
Perimeter: p = 31
Semiperimeter: s = 15.5

Angle ∠ A = α = 16.50657537272° = 16°30'21″ = 0.28880797481 rad
Angle ∠ B = β = 67.42327592381° = 67°25'22″ = 1.17767491395 rad
Angle ∠ C = γ = 96.07114870347° = 96°4'17″ = 1.6776763766 rad

Height: ha = 12.92770791364
Height: hb = 3.97875628112
Height: hc = 3.69334511818

Median: ma = 13.36603892159
Median: mb = 7.98443597113
Median: mc = 6.59554529791

Inradius: r = 1.66880102112
Circumradius: R = 7.03994865723

Vertex coordinates: A[14; 0] B[0; 0] C[1.53657142857; 3.69334511818]
Centroid: CG[5.17985714286; 1.23111503939]
Coordinates of the circumscribed circle: U[7; -0.74545610798]
Coordinates of the inscribed circle: I[2.5; 1.66880102112]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 163.4944246273° = 163°29'39″ = 0.28880797481 rad
∠ B' = β' = 112.5777240762° = 112°34'38″ = 1.17767491395 rad
∠ C' = γ' = 83.92985129653° = 83°55'43″ = 1.6776763766 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.