# 10 26 29 triangle

### Obtuse scalene triangle.

Sides: a = 10   b = 26   c = 29

Area: T = 128.9880376414
Perimeter: p = 65
Semiperimeter: s = 32.5

Angle ∠ A = α = 20.00662724699° = 20°23″ = 0.34991753257 rad
Angle ∠ B = β = 62.81329717487° = 62°48'47″ = 1.096629317 rad
Angle ∠ C = γ = 97.18107557815° = 97°10'51″ = 1.6966124158 rad

Height: ha = 25.79660752829
Height: hb = 9.92215674165
Height: hc = 8.89551983734

Median: ma = 27.08332051279
Median: mb = 17.36437553542
Median: mc = 13.3322291626

Inradius: r = 3.96986269666
Circumradius: R = 14.61546262897

Vertex coordinates: A[29; 0] B[0; 0] C[4.56989655172; 8.89551983734]
Centroid: CG[11.19896551724; 2.96550661245]
Coordinates of the circumscribed circle: U[14.5; -1.82768282862]
Coordinates of the inscribed circle: I[6.5; 3.96986269666]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 159.994372753° = 159°59'37″ = 0.34991753257 rad
∠ B' = β' = 117.1877028251° = 117°11'13″ = 1.096629317 rad
∠ C' = γ' = 82.81992442185° = 82°49'9″ = 1.6966124158 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.