# 9 23 29 triangle

### Obtuse scalene triangle.

Sides: a = 9   b = 23   c = 29

Area: T = 85.89105553597
Perimeter: p = 61
Semiperimeter: s = 30.5

Angle ∠ A = α = 14.92443160109° = 14°55'28″ = 0.2660478453 rad
Angle ∠ B = β = 41.16600882965° = 41°9'36″ = 0.71883790612 rad
Angle ∠ C = γ = 123.9165595693° = 123°54'56″ = 2.16327351394 rad

Height: ha = 19.08767900799
Height: hb = 7.46987439443
Height: hc = 5.92334865765

Median: ma = 25.78327461687
Median: mb = 18.13114643645
Median: mc = 9.7343961167

Inradius: r = 2.81660837823
Circumradius: R = 17.47328175143

Vertex coordinates: A[29; 0] B[0; 0] C[6.7765862069; 5.92334865765]
Centroid: CG[11.92552873563; 1.97444955255]
Coordinates of the circumscribed circle: U[14.5; -9.74993257145]
Coordinates of the inscribed circle: I[7.5; 2.81660837823]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 165.0765683989° = 165°4'32″ = 0.2660478453 rad
∠ B' = β' = 138.8439911704° = 138°50'24″ = 0.71883790612 rad
∠ C' = γ' = 56.08444043074° = 56°5'4″ = 2.16327351394 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.