# 14 18 29 triangle

### Obtuse scalene triangle.

Sides: a = 14   b = 18   c = 29

Area: T = 97.13987538524
Perimeter: p = 61
Semiperimeter: s = 30.5

Angle ∠ A = α = 21.8550073012° = 21°51' = 0.38113557159 rad
Angle ∠ B = β = 28.58985262968° = 28°35'19″ = 0.49989639122 rad
Angle ∠ C = γ = 129.5611400691° = 129°33'41″ = 2.26112730256 rad

Height: ha = 13.87769648361
Height: hb = 10.79331948725
Height: hc = 6.69992244036

Median: ma = 23.09876189249
Median: mb = 20.91765006634
Median: mc = 7.05333679898

Inradius: r = 3.18548771755
Circumradius: R = 18.80881473927

Vertex coordinates: A[29; 0] B[0; 0] C[12.29331034483; 6.69992244036]
Centroid: CG[13.76443678161; 2.23330748012]
Coordinates of the circumscribed circle: U[14.5; -11.9798998637]
Coordinates of the inscribed circle: I[12.5; 3.18548771755]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 158.1549926988° = 158°9' = 0.38113557159 rad
∠ B' = β' = 151.4111473703° = 151°24'41″ = 0.49989639122 rad
∠ C' = γ' = 50.43985993088° = 50°26'19″ = 2.26112730256 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.