# 9 22 29 triangle

### Obtuse scalene triangle.

Sides: a = 9   b = 22   c = 29

Area: T = 70.99329573972
Perimeter: p = 60
Semiperimeter: s = 30

Angle ∠ A = α = 12.85987602998° = 12°51'32″ = 0.2244427705 rad
Angle ∠ B = β = 32.95768545469° = 32°57'25″ = 0.57552056229 rad
Angle ∠ C = γ = 134.1844385153° = 134°11'4″ = 2.34219593257 rad

Height: ha = 15.77662127549
Height: hb = 6.45439052179
Height: hc = 4.89660660274

Median: ma = 25.34326517949
Median: mb = 18.43990889146
Median: mc = 8.5

Inradius: r = 2.36664319132
Circumradius: R = 20.22203155444

Vertex coordinates: A[29; 0] B[0; 0] C[7.55217241379; 4.89660660274]
Centroid: CG[12.1843908046; 1.63220220091]
Coordinates of the circumscribed circle: U[14.5; -14.09329471976]
Coordinates of the inscribed circle: I[8; 2.36664319132]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 167.14112397° = 167°8'28″ = 0.2244427705 rad
∠ B' = β' = 147.0433145453° = 147°2'35″ = 0.57552056229 rad
∠ C' = γ' = 45.81656148467° = 45°48'56″ = 2.34219593257 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.