# 9 14 17 triangle

### Obtuse scalene triangle.

Sides: a = 9   b = 14   c = 17

Area: T = 62.92985308902
Perimeter: p = 40
Semiperimeter: s = 20

Angle ∠ A = α = 31.9255166456° = 31°55'31″ = 0.55771992689 rad
Angle ∠ B = β = 55.34554309073° = 55°20'44″ = 0.96659599953 rad
Angle ∠ C = γ = 92.72994026368° = 92°43'46″ = 1.61884333894 rad

Height: ha = 13.98441179756
Height: hb = 8.99897901272
Height: hc = 7.40333565753

Median: ma = 14.90880515159
Median: mb = 11.66219037897
Median: mc = 8.1399410298

Inradius: r = 3.14664265445
Circumradius: R = 8.5109653609

Vertex coordinates: A[17; 0] B[0; 0] C[5.11876470588; 7.40333565753]
Centroid: CG[7.37325490196; 2.46877855251]
Coordinates of the circumscribed circle: U[8.5; -0.40552216004]
Coordinates of the inscribed circle: I[6; 3.14664265445]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 148.0754833544° = 148°4'29″ = 0.55771992689 rad
∠ B' = β' = 124.6554569093° = 124°39'16″ = 0.96659599953 rad
∠ C' = γ' = 87.27105973632° = 87°16'14″ = 1.61884333894 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.